Study of the B$^+$ $\to$ J$/\psi\overline{\Lambda}$p decay in proton-proton collisions at $\sqrt{s} =$ 8 TeV

TL;DR

This paper measures the branching ratio of the B$^+$ $ o$ J$/ar{mbda}$p decay in proton-proton collisions at 8 TeV, investigates invariant mass distributions, and finds evidence for excited kaon contributions.

Contribution

It provides the first measurement of the branching ratio for this decay and performs an angular analysis revealing excited kaon states involved.

Findings

Branching ratio measured as (1.054 ± 0.057 (stat) ± 0.035 (syst) ± 0.011 (B))%.

Invariant mass distributions are inconsistent with pure phase space.

Evidence suggests contributions from excited kaons decaying to mbda p.

Abstract

A study of the B$^+$ $\to$ J$/\psi\overline{\Lambda}$p decay using proton-proton collision data collected at $\sqrt{s} =$ 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb$^{-1}$, is presented. The ratio of branching fractions $\mathcal{B}$(B$^+$ $\to$ J$/\psi\overline{\Lambda}$p ) / $\mathcal{B}$(B$^+$ $\to$ J$/\psi$K$^*$(892)$^+$) is measured to be (1.054 $\pm$ 0.057 (stat) $\pm$ 0.035 (syst) $\pm$ 0.011 ($\mathcal{B}$))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of $\overline{\Lambda}$ and K$^*$(892)$^+$ decays to reconstructed final states. The invariant mass distributions of the J$/\psi\overline{\Lambda}$, J$/\psi$p, and $\overline{\Lambda}$p systems produced in the B$^+$ $\to$ J$/\psi\overline{\Lambda}$p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the $\overline{\Lambda}$p system.

Equations

$$\frac{\mathcal{B}(\text{PBp}\to \text{JPsi}\text{PagL}\text{Pp})}{\mathcal{B}(\text{PBp}\to \text{JPsi}{\text{PK}}^{\ast +})}=\frac{N(\text{PBp}\to \text{JPsi}\text{PagL}\text{Pp})\mathcal{B}({\text{PK}}^{\ast +}\to \text{PKzS}\text{Pgpp})\mathcal{B}(\text{PKzS}\to \text{Pgpp}\text{Pgpm})ϵ(\text{PBp}\to \text{JPsi}{\text{PK}}^{\ast +})}{N(\text{PBp}\to \text{JPsi}{\text{PK}}^{\ast +})\mathcal{B}(\text{PagL}\to \text{Pap}\text{Pgpp})ϵ(\text{PBp}\to \text{JPsi}\text{PagL}\text{Pp})},$$

$$\frac{\text{rd}N}{\text{rd}\cos {\theta }_{{\text{PK}}^{\ast }}}=\sum _{j=0}^{l_{\text{max}}}⟨P_j^U⟩P_j(\cos {\theta }_{{\text{PK}}^{\ast }}),$$

$$⟨P_j^U⟩=\sum _{i=1}^{N_{\text{reco}}}\frac{w_{\text{sPlot}}^i}{{ϵ}^i}{P}_j(\cos {\theta }_{{\text{PK}}^{\ast }}),$$

$$d_{{\lambda }_1,{\lambda }_2}^S({\theta }_{{\text{PK}}^{\ast }})=\sum _{s=s_{\text{min}}}^{s_{\text{max}}}(-1{)}^s\frac{\sqrt{(S+{\lambda }_2)!(S-{\lambda }_2)!(S+{\lambda }_1)!(S-{\lambda }_1)!}}{(S+{\lambda }_2-s)!(S-{\lambda }_1-s)!(s-{\lambda }_2+{\lambda }_1)!s!}{\left(\cos \frac{{\theta }_{{\text{PK}}^{\ast }}}{2}\right)}^{n_1}{\left(\sin \frac{{\theta }_{{\text{PK}}^{\ast }}}{2}\right)}^{n_2},$$

$$s_{\text{min}}=\text{min}\{0,{\lambda }_2-{\lambda }_1\}\ge -2S,s_{\text{max}}=\text{max}\{0,S+{\lambda }_2,S-{\lambda }_1\}\le 2S.$$

$$\frac{\text{rd}N}{\text{rd}\cos {\theta }_{{\text{PK}}^{\ast }}}=\frac{N}{2}+\sum _{j=1}^{l_{\text{max}}}⟨P_j^U⟩P_j(\cos {\theta }_{{\text{PK}}^{\ast }})=\frac{N}{2}(1+\sum _{j=1}^{l_{\text{max}}}⟨\frac{2⟨P_j^U⟩}{N}⟩P_j(\cos {\theta }_{{\text{PK}}^{\ast }})).$$

$$w^i=1+\sum _{j=1}^{l_{\text{max}}}⟨P_j^N⟩P_j(\cos {\theta }_{{\text{PK}}^{\ast }}),$$

$$2\Delta \text{NLL}=-2\sum _{i=1}^N\ln \frac{F^X(H_{\text{L8}})}{F^X(H_{\cos \theta })},$$

Full text

0.1 Introduction

The $\PBp\to\JPsi\PagL\Pp$ decay is the first observed example of a $\PB$ meson decay into baryons and a charmonium state (the charge-conjugate states are implied throughout the paper). The first evidence for the $\PBp\to\JPsi\PagL\Pp$ decay was obtained by the BaBar Collaboration [1], along with a measurement of its branching fraction of $\mathcal{B}(\PBp\to\JPsi\PagL\Pp)=(12^{+9}_{-6})\times 10^{-6}$. Later, this decay was observed by the Belle Collaboration and its branching fraction was measured to be $\mathcal{B}(\PBp\to\JPsi\PagL\Pp)=(11.7\pm 2.8^{+1.8}_{-2.3})\times 10^{-6}$ [2], resulting in the world-average branching fraction of $\mathcal{B}(\PBp\to\JPsi\PagL\Pp)=(11.8\pm 3.1)\times 10^{-6}$ [3].

The decay mode under study provides an opportunity to search for new intermediate resonances in the $\JPsi\PagL$, $\JPsi\Pp$, and $\PagL\Pp$ systems. The interest in $\PB$ hadron decays to charmonium-baryon systems has increased since the observation of three pentaquark states in ${\PgL}_{\PQb}^{0}\to\JPsi\Pp\PKm$ decays by the LHCb Collaboration [4, 5]. While these states are beyond the available phase space of the $\PBp\to\JPsi\PagL\Pp$ decay, this process can target potential low-mass pentaquark states in the $\JPsi\Pp$ system, as well as new resonances in the $\JPsi\PagL$ system, where one of the new states is expected to appear close to the threshold and represent itself as a threshold enhancement [6]. Recently, the existence of a molecular baryon state decaying to $\JPsi\PagL$ and potentially accessible via the $\PBp\to\JPsi\PagL\Pp$ decay has been predicted [7].

In this paper, we report on a study of the $\PBp\to\JPsi\PagL\Pp$ ($\JPsi\to\PGmp\PGmm$, $\PagL\to\Pap\Pgpp$) decay using a data sample of proton-proton ($\Pp\Pp$) collisions collected by the CMS experiment in 2012 at $\sqrt{s}=8\TeV$, corresponding to an integrated luminosity of 19.6$\fbinv$. Exploring the large available integrated luminosities of $\Pp\Pp$ collisions and the large production cross section of $\bbbar$ pairs at the CERN LHC, the CMS experiment has developed an efficient trigger for displaced $\JPsi\to\PGmp\PGmm$ decays, described in Section 0.3. This trigger allowed CMS to conduct this study of the $\PBp\to\JPsi\PagL\Pp$ decay, including the measurement of its branching fraction and the study of the $\JPsi\PagL$, $\JPsi\Pp$, and $\PagL\Pp$ systems. The decay $\PBp\to\JPsi\PK^{*}(892)^{+}$ ($\PK^{*}(892)^{+}\to\PKzS\Pgpp\to\Pgpp\Pgpm\Pgpp$) is chosen as the normalization channel, because it is measured with high precision and has a similar decay topology to the $\PBp\to\JPsi\PagL\Pp$ decay. In what follows, the $\PK^{*}(892)^{+}$ particle is denoted as $\PK^{*+}$. The ratio of the branching fractions is measured using the following formula:

[TABLE]

where $N$ and $\epsilon$ correspond to the number of observed decays and the total efficiency of the decay, respectively. The total efficiency includes the product of efficiencies for the subsequent decays $\PK^{*+}\to\PKzS\Pgpp$, $\PKzS\to\Pgpp\Pgpm$, and $\PagL\to\Pap\Pgpp$. The invariant mass distributions of the $\JPsi\PagL$, $\JPsi\Pp$, and $\PagL\Pp$ systems produced in the $\PBp\to\JPsi\PagL\Pp$ decay are investigated using a model-independent angular analysis.

0.2 The CMS detector

The central feature of the CMS apparatus is a superconducting solenoid of 6$\unit{m}$ internal diameter, providing a magnetic field of 3.8$\unit{T}$. Within the solenoid volume are a silicon pixel and strip tracker, a lead tungstate crystal electromagnetic calorimeter, and a brass and scintillator hadron calorimeter, each composed of a barrel and two endcap sections. Forward calorimeters extend the pseudorapidity ($\eta$) coverage provided by the barrel and endcap detectors. Muons are detected in gas-ionization chambers embedded in the steel flux-return yoke outside the solenoid. The main subdetectors used for the present analysis are the silicon tracker and the muon system.

The silicon tracker measures charged particles within the range $\abs{\eta}<2.5$. During the LHC running period when the data used in this paper were recorded, the silicon tracker consisted of 1440 silicon pixel and 15 148 silicon strip detector modules. The track resolutions are typically 1.5$\%$ in transverse momentum ($\pt$) and 25–90 (45–150)$\mum$ in the transverse (longitudinal) impact parameter [8] for nonisolated particles with $1<\pt<10\GeV$ and $\abs{\eta}<1.4$.

Muons are measured within $\abs{\eta}<2.4$, with detection planes made using three technologies: drift tubes, cathode strip chambers, and resistive-plate chambers. Matching muons to tracks measured in the silicon tracker results in a relative $\pt$ resolution of 0.8–3.0$\%$ for muons with $\pt<10\GeV$ used in this analysis, depending on the muon $\abs{\eta}$ [9].

Events of interest are selected using a two-tiered trigger system [10]. The first level (L1), composed of custom hardware processors, uses information from the calorimeters and muon detectors to select events at a rate of around 100$\unit{kHz}$ within a time interval of less than 4$\mus$. The second level, known as the high-level trigger (HLT), consists of a farm of processors running a version of the full event reconstruction software optimized for fast processing, and reduces the event rate to around 1$\unit{kHz}$ before data storage.

A more detailed description of the CMS detector, together with a definition of the coordinate system used and the relevant kinematic variables, can be found in Ref. [11].

0.3 Data sample and event selection

Data were collected with a dedicated trigger, optimized for the selection of $\PQb$ hadrons decaying to $\JPsi(\PGmp\PGmm)$. The L1 trigger required two oppositely charged muons, each with $\pt>3\GeV$ and $\abs{\eta}<2.1$. At the HLT, a $\JPsi$ candidate decaying into a $\PGmp\PGmm$ pair displaced from the interaction point was required. Each muon must have $\pt>4\GeV$, and the dimuon $\pt$ must exceed $6.9\GeV$. The HLT demanded that $\JPsi$ candidates reconstructed from opposite-sign dimuons have an invariant mass between 2.9 and 3.3\GeV. The three-dimensional (3D) distance of closest approach of the two muons of a pair to each other was required to be less than 0.5\unitcm. The dimuon vertex fit was required to have a transverse decay length significance $L_{xy}/\sigma_{L_{xy}}>3$, where $L_{xy}$ and $\sigma_{L_{xy}}$ are, respectively, the distance from the common vertex to the beam axis in the transverse plane, and its uncertainty. Finally, the dimuon vertex fit probability, calculated using the $\chi^{2}$ and the number of degrees of freedom of the vertex fit, was required to exceed 10$\%$, while the angle $\alpha$ between the dimuon $\pt$ vector and the direction connecting the beam spot and the dimuon vertex in the transverse plane was required to satisfy $\cos\alpha>0.9$.

The analysis requires two muons of opposite charge that must match those that triggered the event readout. The trigger requirements are confirmed and the $\JPsi$ candidates are selected by tightening the dimuon mass region to be within 150$\MeV$ of the $\JPsi$ meson mass $M_{\JPsi}^{\text{PDG}}$ [3] ($M_{\text{X}}^{\text{PDG}}$ denotes the world-average mass of hadron X).

To reconstruct a $\PBp$ candidate, the $\JPsi$ candidate is combined with a positively charged particle track, assumed to be a proton track, and a $\PagL$ candidate. The track must satisfy the CMS high-purity requirements [8]. The $\PagL$ candidates are formed from displaced two-prong vertices under the assumption of the $\PagL\to\Pap\Pgpp$ decay, as described in Ref. [12]. Daughter particles of the $\PagL$ candidate are refitted to a common vertex, and the vertex fit probability must exceed $1\%$. The proton mass is assigned to the higher-$\pt$ daughter track. To select the candidates in the $\PagL$ signal region, we demand that the $\Pap\Pgpp$ invariant mass satisfy $\abs{M(\Pap\Pgpp)-M_{\PagL}^{\text{PDG}}}<2\sigma^{\PagL}$, where the effective $\PagL$ signal resolution $\sigma^{\PagL}=3.7\MeV$ is measured in data by fitting the $M(\Pap\Pgpp)$ distribution with a sum of two Gaussian functions with a common mean.

Since reliable charged hadron type identification in CMS is not possible, the contribution from $\PKzS\to\Pgpm\Pgpp$ decays is present in the $\PagL\to\Pap\Pgpp$ sample. It is removed by demanding that the invariant mass of the two $\PagL$ candidate tracks, where both are assigned the charged pion mass, satisfies $\abs{M(\Pgpp\Pgpm)-M_{\PKzS}^{\text{PDG}}}>2\sigma^{\PKzS}$, where the effective $\PKzS$ signal resolution $\sigma^{\PKzS}=9.2\MeV$ is measured in data by fitting the $M(\Pgpp\Pgpm)$ distribution with a sum of two Gaussian functions with a common mean.

As the last step of the reconstruction, the kinematic vertex fit of the $\PagL$ candidate, the proton track, and the dimuon is performed, with the dimuon mass constrained to $M_{\JPsi}^{\text{PDG}}$; this vertex is referred to as the $\PB$ vertex. The selected candidates are required to have $\pt(\JPsi)>7\GeV$, $\pt(\PagL)>1\GeV$, and $\pt(\Pp)>1\GeV$.

Multiple $\Pp\Pp$ interactions in the same or nearby beam crossing (pileup) are present in data, with an average multiplicity of about 20. The hard-scattering vertex in the event with the highest cosine of the three-dimensional (3D) pointing angle between the line connecting this vertex with the $\PB$ vertex and the $\PBp$ candidate momentum is chosen as the primary vertex (PV). The following requirement is used to select $\PBp$ candidates consistent with originating from the PV: $\cos\alpha(\PBp,\text{PV})>0.99$, where $\alpha(\PBp,\text{PV})$ is the two-dimensional (2D) angle in the transverse plane between the $\PBp$ candidate momentum and the vector pointing from the PV to the $\PB$ vertex. The following requirement on the $\PB$ vertex displacement is also applied: $L_{xy}(\PBp)/\sigma_{L_{xy}(\PBp)}>3$, where $L_{xy}(\PBp)$ is the distance between the primary and $\PB$ vertices in the transverse plane, and $\sigma_{L_{xy}(\PBp)}$ is its uncertainty. The $\PBp$ candidate kinematic vertex fit probability must exceed $1\%$. The $\PagL$ candidate is required to be consistent with originating from the $\PBp$ decay by requiring $\cos\alpha({\PagL,\PBp})>0$, where $\alpha({\PagL,\PBp})$ is the angle between the $\PagL$ momentum and the vector connecting the $\PBp$ and $\PagL$ vertices.

The normalization decay channel $\PBp\to\JPsi\PK^{*+}$ ($\PK^{*+}\to\PKzS\Pgpp\to\Pgpp\Pgpm\Pgpp$) candidates are selected using the same reconstruction chain. Identical requirements are used to select the $\JPsi$ candidate and the $\Pgpp$ track from the $\PK^{*+}$ meson decay. The selection of the $\PKzS$ candidates is the same as for the $\PagL$ candidates, except that the invariant mass of the candidate pions from the $\PKzS$ meson decay is required to satisfy $\abs{M(\Pgpp\Pgpm)-M_{\PKzS}^{\text{PDG}}}<2\sigma^{\PKzS}_{\text{eff}}$. The contamination of the $\PKzS$ candidates from the $\PagL\to\Pap\Pgpp$ decay is reduced with the requirement: $\abs{M(\Pap\Pgpp)-M^{\text{PDG}}_{\PagL}}>2\sigma^{\PagL}_{\text{eff}}$, where the negatively charged track is assigned the proton mass.

To calculate the reconstruction efficiency, a study based on simulated signal events is performed. The events are generated with $\PYTHIA$ v6.424 [13]. The $\PB$ meson decays are modeled according to a phase space decay model using $\EVTGEN$ v1.3.0 [14] for both the $\PBp\to\JPsi\PagL\Pp$ and $\PBp\to\JPsi\PK^{*+}$ channels. The simulation sample corresponding to the $\PBp\to\JPsi\PK^{*+}$ decay is reweighted according to the angular distributions of the $\PK^{*+}$ and $\JPsi$ systems observed in data by applying a weight to each simulated event obtained using a linear interpolation of the data-to-simulation ratio histogram for each angular variable. The events are passed through a detailed CMS detector simulation based on $\GEANTfour$ [15]. To estimate reconstruction efficiencies (Section 0.5), matching of the reconstructed candidates to the generated particles is performed by requiring $\Delta R=\sqrt{\smash[b]{(\Delta\eta)^{2}+(\Delta\phi)^{2}}}<0.004$ (0.03) for $\PGm$ ($\Pp$, $\Pgpp$, $\PagL$, and $\PKzS$) candidates, where $\Delta\eta$ and $\Delta\phi$ are the differences in the pseudorapidity and the azimuthal angle, respectively, between the momenta of the reconstructed and generated particles.

0.4 Signal yields extraction

The invariant mass distribution of the selected $\PBp\to\JPsi\PagL\Pp$ candidates is shown in Fig. 1 (upper). An unbinned, extended maximum-likelihood fit with a signal plus background hypothesis is performed on this distribution. The signal component is modeled with a sum of three Gaussian functions with floating common mean and overall normalization, while the widths and the relative normalizations of the three Gaussian functions are fixed to the values obtained from simulation. The background component is parameterized by a threshold function: $(x-x_{0})^{\beta}$, where $x_{0}=M_{\PagL}^{\text{PDG}}+M_{\JPsi}^{\text{PDG}}+M_{\Pp}^{\text{PDG}}$ and $\beta$ is a free parameter of the fit. The fit results in a signal yield of $452\pm 23$ events.

Figure 1 (lower left) shows the observed $\PBp\to\JPsi\PKzS\Pgpp$ invariant mass distribution with the requirement on the $\PKzS\Pgpp$ invariant mass to be inside a $\pm 200\MeV$ window around the world-average $\PK^{*+}$ mass [3]. The $\PBp$ signal is modeled with a sum of two Gaussian functions with a common mean and all the parameters floating in the fit, while the background is described by a second-order polynomial.

In order to evaluate the pure $\PK^{*+}$ meson contribution, excluding other resonances in the $\PKzS\Pgpp$ system, the background-subtracted $M(\PKzS\Pgpp)$ distribution shown in Fig. 1 (lower right) is fitted in the range of $\pm 200\MeV$ around the $\PK^{*+}$ mass. Background subtraction is performed using the sPlot technique [16] with the $M(\JPsi\PKzS\Pgpp)$ used as the discriminating variable. The instrumental mass resolution of the $\PK^{*+}$ peak is negligible in comparison with its natural width; therefore a relativistic Breit–Wigner function is used as the signal model, while a threshold polynomial function is chosen to model the non-$\PK^{*+}$ component: $(x-x_{0}^{\PK^{*}})^{\gamma}$, where $x_{0}^{\PK^{*}}=M_{\PKzS}^{\text{PDG}}+M_{\Pgpp}^{\text{PDG}}$ and $\gamma$ is a free parameter in the fit.

To obtain the observed number of $\PBp\to\JPsi\PK^{*+}$ decays for the measurement of the ratio of branching fractions, the signal Breit–Wigner function is integrated over $\pm 50\MeV$ around the $\PK^{*+}$ mass, resulting in an yield of $20~{}863\pm 357$ events. The efficiency of the requirement on $M(\PKzS\Pgpp)$ of being within $\pm 50\MeV$ of the $\PK^{*+}$ mass is taken into account in the calculation of the total efficiency (Section 0.5).

0.5 Efficiency calculation

The efficiency for detecting and identifying the $\PBp\to\JPsi\PagL\Pp$ decay is calculated as the ratio of the numbers of reconstructed to generated events in simulation. The overall efficiency includes the trigger and reconstruction efficiencies, and the detector acceptance. The efficiency in each channel is obtained using simulated samples described in Section 0.3. The efficiency ratio, which is used in the measurement of the ratio of branching fractions, is found to be $\epsilon(\PBp\to\JPsi\PK^{*+})/\epsilon(\PBp\to\JPsi\PagL\Pp)=1.347\pm 0.023$, where the uncertainty is statistical only and accounts for the limited event counts in the corresponding simulated samples.

For the study of the two-body intermediate invariant masses in the $\PBp\to\JPsi\PagL\Pp$ decay, we perform an efficiency-correction procedure to account for detector effects. Crucial to the investigation of the $\PagL\Pp$ system is the possibility of intermediate high-mass $\PK^{*+}$ resonances that can decay to $\PagL\Pp$ [3]. We list these resonances in Table 0.5 and designate them collectively as $\PK^{*+}_{2,3,4}$. The details of the decay $\PBp\to\JPsi\PK^{*+}_{2,3,4}$, followed by $\PK^{*+}_{2,3,4}\to\PagL\Pp$ are discussed in Section 0.8. Because of this possibility, the efficiency is calculated as a function of two variables: the invariant mass of the $\PagL\Pp$ system, $M(\PagL\Pp)$, and the cosine of the $\PK^{*+}_{2,3,4}\to\PagL\Pp$ system helicity angle $\cos\theta_{\PK^{*}}$, which is defined as the angle between the $\PagL$ and $\PBp$ momentum vectors in the $\PagL\Pp$ system rest frame (as illustrated in Fig. 2 together with other decay angles). The 2D efficiency is calculated as the ratio of the 2D histogram at the reconstruction level to that at the generator level. The data are corrected for the reconstruction efficiency by applying a $1/\epsilon(M(\PagL\Pp),\cos\theta_{\PK^{*}})$ weight to each event. Efficiency values at each point in the 2D space are evaluated using a bilinear interpolation algorithm. Since the points inside the border bins of the 2D space cannot be interpolated, the efficiency values at these points are assumed to be the values at the centers of the corresponding bins.

0.6 Evaluation of the systematic uncertainties in the branching fraction ratio measurement

In this section, we discuss the sources of the systematic uncertainty in the measurement of the ratio ${\cal B}(\PBp\to\JPsi\PagL\Pp)/{\cal B}(\PBp\to\JPsi\PK^{*+})$, defined by Eq. (1).

Since the signal $\PBp\to\JPsi\PagL\Pp$ and the normalization $\PBp\to\JPsi\PK^{*+}$ decays have the same topology, the systematic uncertainties related to the muon reconstruction, track reconstruction, and trigger efficiencies should almost cancel out in Eq. (1). To check if this is the case, simulated signal samples for both $\PBp\to\JPsi\PagL\Pp$ and $\PBp\to\JPsi\PK^{*+}$ decays are validated by comparing distributions of variables used in the event selection between background-subtracted data and simulated signal samples. As a result of these studies, an additional systematic uncertainty is assigned to account for the deviation between data and simulation in the $\eta$ distributions of $\PBp$ meson for the signal and normalization channels, and the $M(\PKzS\Pgpp)$ distribution for the $\PBp\to\JPsi\PK^{*+}$ decay. The deviation in the $\eta$ distributions of $\PBp$ meson were taken into account by reweighting the simulated samples according to the $\eta$ distributions of $\PBp$ meson observed on data and recalculating the efficiency ratio using the reweighted simulation samples; the systematic uncertainty is calculated as the difference in efficiency ratios calculated before and after reweighting. The difference in the $M(\PKzS\Pgpp)$ distribution is taken into account by altering the baseline mass window width used for $\PK^{*+}$ selection of 50\MeV, with 35 and 70\MeVwindows, and recalculating the final branching fraction value; the largest deviation from the value obtained using the baseline selection is considered as systematic uncertainty.

The systematic uncertainty related to the choice of the background model is estimated separately for the fits to the $\JPsi\PagL\Pp$, $\JPsi\PKzS\Pgpp{}$, and $\PKzS\Pgpp$ invariant mass distributions. To evaluate this uncertainty, several additional background modeling functions were used: polynomials of the first, second, and third order for the $\JPsi\PKzS\Pgpp$ invariant mass distribution; and the function $(x-x_{0})^{\delta}$ multiplied by polynomials of the first and second order for the $\JPsi\PagL\Pp$ and $\PKzS\Pgpp$ invariant mass distributions.

Another source of systematic uncertainty is due to the modeling of the signal shape in the $M(\JPsi\PagL\Pp)$ and $M(\JPsi\PKzS\Pgpp)$ invariant mass distributions. In the case of the $\PBp\to\JPsi\PagL\Pp$ decay, the resolution functions in the baseline fits are obtained from simulation. The associated uncertainty is estimated by allowing the widths to float in the fit and by adding a double-Gaussian function as a fit option. For the $\PBp\to\JPsi\PK^{*+}$ decay, the corresponding systematic uncertainty is estimated by using alternative signal models to fit the $\JPsi\PKzS\Pgpp$ invariant mass distribution, such as a sum of three Gaussian functions or two Crystal Ball functions [17, 18].

For each of the variations, the largest deviation in the measured signal yield is used as the systematic uncertainty. Variations of the signal and background components are performed independently. The uncertainty in the relative efficiency from the simulation related to the limited number of events in the simulated samples is considered as an additional source of systematic uncertainty.

Table 0.6 summarizes the individual systematic uncertainties, as well as the total systematic uncertainty, calculated as the quadratic sum of the individual components.

0.7 Measurement of the ratio of branching fractions

Using the world-average values of the $\mathcal{B}(\PK^{*+}\to\PKzS\Pgpp)$, $\mathcal{B}(\PKzS\to\Pgpp\Pgpm)$, $\mathcal{B}(\PagL\to\Pap\Pgpp)$ branching fractions [3], the relative efficiency described in Section 0.5, and the signal yields, the ratio ${\cal B}(\PBp\to\JPsi\PagL\Pp)/{\cal B}(\PBp\to\JPsi\PK^{*+})$ is measured using Eq. (1) to be $(1.054\pm 0.057\stat\pm 0.035\syst\pm 0.011({\cal B}))\%$, where the first uncertainty is statistical, the second is systematic (as discussed in Section 0.6), and the third is due to the uncertainties in the world-average branching fractions of the decays involved.

From this ratio and the world-average value of ${\cal B}(\PBp\to\JPsi\PK^{*+})=(1.43\pm 0.08)\times 10^{-3}$ [3], the branching fraction ${\cal B}(\PBp\to\JPsi\PagL\Pp)$ = $(15.1\pm 0.8\stat\pm 0.5\syst\pm 0.9({\cal B}))\times 10^{-6}$ is obtained, where now the last uncertainty includes the uncertainty in the $\PBp\to\JPsi\PK^{*+}$ branching fraction. This measurement is the most precise to date.

0.8 Study of two-body invariant mass spectra

In this section, the invariant mass distributions of the $\JPsi\PagL$, $\JPsi\Pp$, and $\PagL\Pp$ two-body combinations of the $\PBp\to\JPsi\PagL\Pp$ decay products are investigated. To account for the event selection efficiency, each event is assigned a weight equal to $1/\epsilon(M(\Pp\PagL),\cos\theta_{\PK^{*}})$, where $\epsilon(M(\PagL\Pp),\cos\theta_{\PK^{*}})$ is obtained from simulation, as described in Section 0.5. Background subtraction is performed using the sPlot technique, with the $\JPsi\PagL\Pp$ invariant mass as the discriminating variable. Figure 3 shows the efficiency-corrected and background-subtracted invariant mass distributions of the $\JPsi\Pp$, $\JPsi\PagL$, and $\PagL\Pp$ systems. These invariant mass distributions are compared with the pure phase space decay hypothesis (shown by the dashed lines), obtained from the generator-level simulation. The data are poorly described by the pure phase space hypothesis in all three distributions. The degree of incompatibility between the data and this hypothesis is measured using the likelihood ratio method and is determined to be at least 6.1, 5.5, and 3.4 standard deviations for the $\JPsi\Pp$, $\JPsi\PagL$, and $\PagL\Pp$ invariant mass distributions, respectively. More details of the significance calculation are given in Section 0.8.1. We conclude that none of the three mass spectra can be adequately described by a pure three-body nonresonant phase space decay hypothesis, which is an indication of more complex dynamics in the $\PBp\to\JPsi\PagL\Pp$ decay.

There are at least three known $\PK^{*+}$ resonances, which we designate as $\PK^{*+}_{2,3,4}$, that can decay to $\PagL\Pp$, as listed in Table 0.5 [3]. Even though the three $\PK^{*+}_{2,3,4}$ resonances listed in Table 0.5 are beyond the kinematic region of the $\PBp\to\JPsi\PagL\Pp$ decay, these broad excited kaon states can contribute to the $\JPsi\Pp$ and $\JPsi\PagL$ invariant mass distributions, altering the pure phase space distributions.

To account for possible contributions from these resonances, we use a model-independent approach developed by BaBar in a search for the $\PZ(4430)$ resonance in the $\JPsi\Pgpp$ and $\psi(2S)\Pgpp$ channels [19]. This approach was later used by LHCb in a similar search for the $\PZ(4430)$ particle in the $\psi(2S)\Pgpp$ invariant mass spectrum [20] and to support the observation of possible pentaquark states $\cmsSymbolFace{P}_{\PQc}(4380)^{+}$ and $\cmsSymbolFace{P}_{\PQc}(4450)^{+}$ in the $\JPsi\Pp$ system [21]. This method tests whether the contributions from a reflection of the resonant $\PagL\Pp$ angular amplitudes in the $\JPsi\PagL$ and $\JPsi\Pp$ spectra are sufficient to describe the data.

The background-subtracted and efficiency-corrected $\cos\theta_{\PK^{*}}$ distribution in data is shown in Fig. 4. It is clear that, unlike the simulation of $\PBp\to\JPsi\PagL\Pp$ decay based on a pure phase space hypothesis, shown in the same figure, the distribution from data is not flat and has a structure that could affect the two-body invariant mass distributions under study.

In bins of $M(\PagL\Pp)$, the $\cos\theta_{\PK^{*}}$ distribution can be expressed as an expansion in terms of Legendre polynomials:

[TABLE]

where $N$ is the efficiency-corrected and background-subtracted yield, $l_{\text{max}}$ depends on the maximum angular momentum used to describe the data, $P_{j}$ are the Legendre polynomials, and $\langle P_{j}^{U}\rangle$ are the unnormalized Legendre moments. The Legendre moments contain the full angular information of the $\PagL\Pp$ system and can be expressed using the following formula obtained by projecting the moments in Eq. (2) onto a Legendre polynomial basis:

[TABLE]

where $N_{\text{reco}}$ is the number of selected events in each $M(\PagL\Pp)$ bin, $\epsilon^{i}=\epsilon^{i}(\cos\theta^{i}_{\PK^{*}},M(\PagL\Pp))$ is the efficiency correction factor, obtained as described in Section 0.5, and $w^{i}_{\textit{sPlot}}$ is the sPlot background subtraction weight.

To determine the proper value for $l_{\text{max}}$, we note that the $\rd N/\rd\cos\theta_{\PK^{*}}$ distribution for a $\PK^{*}$ resonance with spin $S$ is proportional to the square of the Wigner $d$ function $d^{S(\PK^{*})}_{\lambda_{\PK^{*}},(\lambda_{\Pp}-\lambda_{\PagL})}(\theta_{\PK^{*}})$, given by the following equation:

[TABLE]

where $n_{1}=2S+\lambda_{2}-\lambda_{1}-2s$, $n_{2}=\lambda_{1}-\lambda_{2}+2s$, $\lambda_{1}=\lambda_{\PK^{*}}$, and $\lambda_{2}=\lambda_{\Pp}-\lambda_{\PagL}$ are the corresponding spin projections, and $s$ is an integer such that:

[TABLE]

By expanding Eq. (4), one can see that the maximum power of $\cos\theta_{\PK^{*}}$ in the expression for $\rd N/\rd\cos\theta_{\PK^{*}}\sim(d^{S}_{\lambda_{1},\lambda_{2}}(\theta_{\PK^{*}}))^{2}$ is given by $l_{\text{max}}=n_{1}+n_{2}=2S$. Similarly, if one considers the interference between two resonances with spins $S_{1}$ and $S_{2}$, $l_{\text{max}}=S_{1}+S_{2}$. Consequently, in order to fully describe the contributions from the resonances listed in Table 0.5, including their interference, it is sufficient to consider the Legendre moments up to twice the maximum spin of the considered resonances, i.e., $l_{\text{max}}=8$. The dependence of the first eight Legendre moments on $M(\PagL\Pp)$ from data is shown in Fig. 5. If there were no resonant contributions to the intermediate two-body systems in the $\PBp\to\JPsi\PagL\Pp$ decay, the distributions shown in Fig. 5 would all be consistent with zero, which is not the case.

To investigate whether the $\PagL\Pp$ angular structure caused by the $\PK^{*+}_{2,3,4}$ resonances with spins up to four is sufficient to describe the data, a reweighting of the simulated signal sample is performed and the result is compared with the background-subtracted and efficiency-corrected data. A significant disagreement between the data and the reweighted simulation that accounts for the invariant mass of the $\PagL\Pp$ system and the angular structure corresponding to the resonances with the spin up to four in the $\PagL\Pp$ system may indicate the presence of an exotic state in the $\JPsi\PagL$ or $\JPsi\Pp$ systems. Since the data are corrected for the reconstruction efficiency, we use generator-level simulated samples without detector simulation for the reweighting. The simulation is forced to reproduce the $\PagL\Pp$ invariant mass spectrum observed in data by applying a weight to each simulated event obtained using a linear interpolation of the data-to-simulation ratio histogram. The angular structure is introduced into the simulation by using appropriate weights, described below. To obtain the weights corresponding to the angular structure, Eq. (2) is expanded as follows:

[TABLE]

The factor of $N/2$ in Eq. (6) appears because of the Legendre polynomial normalization convention, i.e., $\langle P_{0}^{N}\rangle P_{0}(\cos\theta_{\PK^{*}})=1/2$. By factoring out the $N/2$ term from the right-hand side of Eq. (6), one can obtain the weights given by the following equation:

[TABLE]

where $\langle P_{j}^{N}\rangle=2\langle P_{j}^{U}\rangle/N_{\text{reco}}^{\text{corr}}$ are the normalized Legendre moments and $N_{\text{reco}}^{\text{corr}}$ is the corrected number of reconstructed events in each $M(\PagL\Pp)$ bin.

The templates obtained after applying the weights corresponding to the observed $\PagL\Pp$ invariant mass structure, as well as the weights given by Eq. (7) applied to the simulation, are then compared with the efficiency-corrected and background-subtracted data. Results are shown in Fig. 3 (solid line). As seen from the lower panel in the figure, the $M(\PagL\Pp)$ distribution in data is well described by the reweighted simulation, which is expected by the construction of the weights. The $M(\PagL\Pp)$ distribution is not affected by the $w^{i}$ weights since the integrals of the individual $P_{j}(x)$ functions over the full range in $\cos\theta_{\PK^{*}}$ are equal to zero. It is also evident from the two upper panels in Fig. 3 that the description of the $M(\JPsi\Pp)$ and $M(\JPsi\PagL)$ data distributions is improved after accounting for both the observed angular and invariant mass structures in the $\PagL\Pp$ system.

0.8.1 Significance calculation

In this section, the compatibility of the data with both hypotheses of pure phase space ($H_{\text{PS}}$) and phase space augmented with the eight Legendre moments and the reweighting of the $M(\PagL\Pp)$ distribution to describe the structure observed in data ($H_{\text{L8}}$) is quantified using the likelihood ratio technique. To test the compatibility of data with the $H_{\text{L8}}$ hypothesis, 2000 pseudo-experiments were generated, each with the number of signal events, $N$, equal to the one observed in data, according to the probability density function corresponding to this hypothesis $F^{X}(H_{\text{L8}})$, where $X$ stands for the projection on the invariant mass of the corresponding system. An additional hypothesis $H_{\cos\theta}$ has a probability density function $F^{X}(H_{\cos\theta})$ that accounts for all the features in the $\cos\theta_{\PK^{*}}$ and $M(\PagL\Pp)$ distributions observed in data. It is obtained by reweighting the pure phase space simulation to reproduce the $\cos\theta_{\PK^{*}}$ distribution in data (shown in Fig. 4) in each $M(\PagL\Pp)$ bin, as well as by reweighting the $M(\PagL\Pp)$ spectrum in simulation to match the one observed in data. Therefore, the $F^{X}(H_{\cos\theta})$ function reflects the total angular structure of the $\PagL\Pp$ system and provides the best description of the $M(\JPsi\PagL)$ and $M(\JPsi\Pp)$ invariant mass spectra. The logarithm of the likelihood ratio is used to define the test statistic:

[TABLE]

where the sum runs over the events in each pseudo-experiment or in data.

The $2\Delta\text{NLL}$ distribution from the pseudo-experiments is well described by a Gaussian function; the $2\Delta\text{NLL}_{\text{data}}$ value is calculated using collision data. The significance of the $H_{\text{L8}}$ hypothesis incompatibility with data is calculated as the number of standard deviations between the observed $2\Delta\text{NLL}_{\text{data}}$ value and the mean value of the $2\Delta\text{NLL}$ distribution from the pseudo-experiments.

The same test is performed to quantify the incompatibility of the data with the pure phase space hypothesis $H_{\text{PS}}$, following the procedure described for the test of $H_{\text{L8}}$.

There are several sources of systematic uncertainty that could affect the significance calculation. The first source is the function used to describe the background component in the $M(\JPsi\PagL\Pp)$ distribution, which enters through the sPlot background-subtraction procedure. This uncertainty is estimated by using two alternative models for the background component in the $M(\JPsi\PagL\Pp)$ spectrum: the baseline model multiplied by a polynomial of either first or second order. Another source of systematic uncertainty is due to statistical fluctuations in the 2D efficiency calculation, discussed in Section 0.5. To test how the significance is affected by these fluctuations, additional parameterizations of the 2D efficiency are considered: a histogram with wider bins and a fit to the efficiency distribution with 2D polynomials, with the uncertainties obtained from the fit taken into account.

The contribution of the systematic uncertainty to the significance calculation from the kinematic requirements used in the selection of the $\PBp\to\JPsi\PagL\Pp$ candidates is also estimated. The effect of the requirement applied to the reflected invariant mass of the $\PagL$ candidate daughters $\abs{M(\Pgpp\Pgpm)-M_{\PKzS}^{\text{PDG}}}>2\sigma^{\PKzS}_{\text{eff}}$ is evaluated by repeating the significance calculation without this requirement. The effect of the $\pt$ selection criteria applied to the $\PBp$ meson and the $\JPsi$, $\PagL$, and $\Pp$ candidates in the final state of the $\PBp\to\JPsi\PagL\Pp$ decay, was also tested by tightening the baseline requirements by 50$\%$ and recalculating the significance values.

The effect of the correlation between the $M(\PagL\Pp)$, $\cos\theta_{\PK^{*}}$, $\JPsi\Pp$, and $\JPsi\PagL$ variables is tested by generating pseudo-experiments according to the two-dimensional probability density function $F^{Y}(H_{\text{L8}})$, where $\text{Y}=(M(\PagL\Pp),~{}\cos\theta_{\PK^{*}})$, and then projecting them to the $\JPsi\Pp$ system invariant mass. The significance values decrease on average by 30%, which does not exceed the significance range introduced by the effects of the other systematics sources discussed above.

Under the variations discussed above, the significance of the incompatibility of data with the $H_{\text{PS}}$ is found to vary from 6.1 to 8.1, 5.5 to 7.4, and 3.4 to 4.8 standard deviations for the $\JPsi\Pp$, $\JPsi\PagL$, and $\PagL\Pp$ invariant mass distributions, respectively. The incompatibility of data with the phase space augmented with the eight Legendre moments and the reweighting of the $M(\PagL\Pp)$ distribution to describe the structure observed in data $H_{\text{L8}}$ varies from 1.3 to 2.8 (2.7) standard deviations for the $\JPsi\Pp$ ($\JPsi\PagL$) invariant mass spectrum, which allows us to conclude that the data are consistent with the $H_{\text{L8}}$ hypothesis. We note that since the quoted statistical significances for the $\JPsi\Pp$ and $\JPsi\PagL$ systems are not independent, they cannot be combined without properly taking into account the correlation. While the presence of new resonances in an intermediate two-body system produced in this decay cannot be ruled out, the deviation of the data from a pure phase space model can be adequately described by including only the known $\PK^{*+}_{2,3,4}$ resonances in the $\PagL\Pp$ system.

0.9 Summary

Using a data set of proton-proton collisions collected by the CMS experiment at $\sqrt{s}=8\TeV$ and corresponding to an integrated luminosity of 19.6\fbinv, the ratio of branching fractions has been measured to be ${\cal B}(\PBp\to\JPsi\PagL\Pp)/{\cal B}(\PBp\to\JPsi\PK^{*}(892)^{+})=(1.054\pm 0.057\stat\pm 0.035\syst\pm 0.011({\cal B}))\%$. Using the world-average branching fraction of the $\PBp\to\JPsi\PK^{*}(892)^{+}$ decay, the branching fraction of the $\PBp\to\JPsi\PagL\Pp$ decay is determined to be $(15.1\pm 0.8\stat\pm 0.5\syst\pm 0.9({\cal B}))\times 10^{-6}$, the most precise measurement to date. A study of the two-body invariant mass distributions of the $\PBp\to\JPsi\PagL\Pp$ decay products demonstrates that these spectra cannot be adequately modeled with a pure phase space decay hypothesis. The incompatibility of the data with this hypothesis is more than 6.1, 5.5, and 3.4 standard deviations for the $\JPsi\Pp$, $\JPsi\PagL$, and $\PagL\Pp$ invariant mass spectra, respectively. A model-independent approach that accounts for the contribution from known $\PK^{*+}_{2,3,4}$ resonances with spins up to 4 decaying to the $\PagL\Pp$ system improves the agreement significantly, decreasing the incompatibility with data to less than three standard deviations in both the $\JPsi\Pp$ and $\JPsi\PagL$ invariant mass spectra.

Acknowledgements.

We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie program and the European Research Council and Horizon 2020 Grant, contract Nos. 675440 and 765710 (European Union); the Leventis Foundation; the A.P. Sloan Foundation; the Alexander von Humboldt Foundation; the Belgian Federal Science Policy Office; the Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture (FRIA-Belgium); the Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the “Excellence of Science – EOS” – be.h project n. 30820817; the Beijing Municipal Science & Technology Commission, No. Z181100004218003; the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Lendület (“Momentum”) Programme and the János Bolyai Research Scholarship of the Hungarian Academy of Sciences, the New National Excellence Program ÚNKP, the NKFIA research grants 123842, 123959, 124845, 124850, 125105, 128713, 128786, and 129058 (Hungary); the Council of Science and Industrial Research, India; the HOMING PLUS program of the Foundation for Polish Science, cofinanced from European Union, Regional Development Fund, the Mobility Plus program of the Ministry of Science and Higher Education, the National Science Center (Poland), contracts Harmonia 2014/14/M/ST2/00428, Opus 2014/13/B/ST2/02543, 2014/15/B/ST2/03998, and 2015/19/B/ST2/02861, Sonata-bis 2012/07/E/ST2/01406; the Ministry of Education and Science of the Russian Federation contract No. 14.W03.31.0026; the National Priorities Research Program by Qatar National Research Fund; the Programa Estatal de Fomento de la Investigación Científica y Técnica de Excelencia María de Maeztu, grant MDM-2015-0509 and the Programa Severo Ochoa del Principado de Asturias; the Thalis and Aristeia programs cofinanced by EU-ESF and the Greek NSRF; the Rachadapisek Sompot Fund for Postdoctoral Fellowship, Chulalongkorn University and the Chulalongkorn Academic into Its 2nd Century Project Advancement Project (Thailand); the Welch Foundation, contract C-1845; and the Weston Havens Foundation (USA).

.10 The CMS Collaboration

\cmsinstskip

**Yerevan Physics Institute, Yerevan, Armenia

** A.M. Sirunyan${}^{\textrm{\textdagger}}$, A. Tumasyan \cmsinstskip**Institut für Hochenergiephysik, Wien, Austria

** W. Adam, F. Ambrogi, T. Bergauer, J. Brandstetter, M. Dragicevic, J. Erö, A. Escalante Del Valle, M. Flechl, R. Frühwirth\cmsAuthorMark1, M. Jeitler\cmsAuthorMark1, N. Krammer, I. Krätschmer, D. Liko, T. Madlener, I. Mikulec, N. Rad, J. Schieck\cmsAuthorMark1, R. Schöfbeck, M. Spanring, D. Spitzbart, W. Waltenberger, C.-E. Wulz\cmsAuthorMark1, M. Zarucki \cmsinstskip**Institute for Nuclear Problems, Minsk, Belarus

** V. Drugakov, V. Mossolov, J. Suarez Gonzalez \cmsinstskip**Universiteit Antwerpen, Antwerpen, Belgium

** M.R. Darwish, E.A. De Wolf, D. Di Croce, X. Janssen, J. Lauwers, A. Lelek, M. Pieters, H. Rejeb Sfar, H. Van Haevermaet, P. Van Mechelen, S. Van Putte, N. Van Remortel \cmsinstskip**Vrije Universiteit Brussel, Brussel, Belgium

** F. Blekman, E.S. Bols, S.S. Chhibra, J. D’Hondt, J. De Clercq, D. Lontkovskyi, S. Lowette, I. Marchesini, S. Moortgat, L. Moreels, Q. Python, K. Skovpen, S. Tavernier, W. Van Doninck, P. Van Mulders, I. Van Parijs \cmsinstskip**Université Libre de Bruxelles, Bruxelles, Belgium

** D. Beghin, B. Bilin, H. Brun, B. Clerbaux, G. De Lentdecker, H. Delannoy, B. Dorney, L. Favart, A. Grebenyuk, A.K. Kalsi, J. Luetic, A. Popov, N. Postiau, E. Starling, L. Thomas, C. Vander Velde, P. Vanlaer, D. Vannerom \cmsinstskip**Ghent University, Ghent, Belgium

** T. Cornelis, D. Dobur, I. Khvastunov\cmsAuthorMark2, M. Niedziela, C. Roskas, D. Trocino, M. Tytgat, W. Verbeke, B. Vermassen, M. Vit, N. Zaganidis \cmsinstskip**Université Catholique de Louvain, Louvain-la-Neuve, Belgium

** O. Bondu, G. Bruno, C. Caputo, P. David, C. Delaere, M. Delcourt, A. Giammanco, V. Lemaitre, A. Magitteri, J. Prisciandaro, A. Saggio, M. Vidal Marono, P. Vischia, J. Zobec \cmsinstskip**Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil

** F.L. Alves, G.A. Alves, G. Correia Silva, C. Hensel, A. Moraes, P. Rebello Teles \cmsinstskip**Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil

** E. Belchior Batista Das Chagas, W. Carvalho, J. Chinellato\cmsAuthorMark3, E. Coelho, E.M. Da Costa, G.G. Da Silveira\cmsAuthorMark4, D. De Jesus Damiao, C. De Oliveira Martins, S. Fonseca De Souza, L.M. Huertas Guativa, H. Malbouisson, J. Martins\cmsAuthorMark5, D. Matos Figueiredo, M. Medina Jaime\cmsAuthorMark6, M. Melo De Almeida, C. Mora Herrera, L. Mundim, H. Nogima, W.L. Prado Da Silva, L.J. Sanchez Rosas, A. Santoro, A. Sznajder, M. Thiel, E.J. Tonelli Manganote\cmsAuthorMark3, F. Torres Da Silva De Araujo, A. Vilela Pereira \cmsinstskip**Universidade Estadual Paulista a, Universidade Federal do ABC b, São Paulo, Brazil

** S. Ahujaa, C.A. Bernardesa, L. Calligarisa, T.R. Fernandez Perez Tomeia, E.M. Gregoresb, D.S. Lemos, P.G. Mercadanteb, S.F. Novaesa, SandraS. Padulaa \cmsinstskip**Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria

** A. Aleksandrov, G. Antchev, R. Hadjiiska, P. Iaydjiev, A. Marinov, M. Misheva, M. Rodozov, M. Shopova, G. Sultanov \cmsinstskip**University of Sofia, Sofia, Bulgaria

** M. Bonchev, A. Dimitrov, T. Ivanov, L. Litov, B. Pavlov, P. Petkov \cmsinstskip**Beihang University, Beijing, China

** W. Fang\cmsAuthorMark7, X. Gao\cmsAuthorMark7, L. Yuan \cmsinstskip**Institute of High Energy Physics, Beijing, China

** M. Ahmad, G.M. Chen, H.S. Chen, M. Chen, C.H. Jiang, D. Leggat, H. Liao, Z. Liu, S.M. Shaheen\cmsAuthorMark8, A. Spiezia, J. Tao, E. Yazgan, H. Zhang, S. Zhang\cmsAuthorMark8, J. Zhao \cmsinstskip**State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China

** A. Agapitos, Y. Ban, G. Chen, A. Levin, J. Li, L. Li, Q. Li, Y. Mao, S.J. Qian, D. Wang, Q. Wang \cmsinstskip**Tsinghua University, Beijing, China

** Z. Hu, Y. Wang \cmsinstskip**Universidad de Los Andes, Bogota, Colombia

** C. Avila, A. Cabrera, L.F. Chaparro Sierra, C. Florez, C.F. González Hernández, M.A. Segura Delgado \cmsinstskip**Universidad de Antioquia, Medellin, Colombia

** J. Mejia Guisao, J.D. Ruiz Alvarez, C.A. Salazar González, N. Vanegas Arbelaez \cmsinstskip**University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia

** D. Giljanović, N. Godinovic, D. Lelas, I. Puljak, T. Sculac \cmsinstskip**University of Split, Faculty of Science, Split, Croatia

** Z. Antunovic, M. Kovac \cmsinstskip**Institute Rudjer Boskovic, Zagreb, Croatia

** V. Brigljevic, S. Ceci, D. Ferencek, K. Kadija, B. Mesic, M. Roguljic, A. Starodumov\cmsAuthorMark9, T. Susa \cmsinstskip**University of Cyprus, Nicosia, Cyprus

** M.W. Ather, A. Attikis, E. Erodotou, A. Ioannou, M. Kolosova, S. Konstantinou, G. Mavromanolakis, J. Mousa, C. Nicolaou, F. Ptochos, P.A. Razis, H. Rykaczewski, D. Tsiakkouri \cmsinstskip**Charles University, Prague, Czech Republic

** M. Finger\cmsAuthorMark10, M. Finger Jr.\cmsAuthorMark10, A. Kveton, J. Tomsa \cmsinstskip**Escuela Politecnica Nacional, Quito, Ecuador

** E. Ayala \cmsinstskip**Universidad San Francisco de Quito, Quito, Ecuador

** E. Carrera Jarrin \cmsinstskip**Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt

** Y. Assran\cmsAuthorMark11*,*\cmsAuthorMark12, S. Elgammal\cmsAuthorMark12 \cmsinstskip**National Institute of Chemical Physics and Biophysics, Tallinn, Estonia

** S. Bhowmik, A. Carvalho Antunes De Oliveira, R.K. Dewanjee, K. Ehataht, M. Kadastik, M. Raidal, C. Veelken \cmsinstskip**Department of Physics, University of Helsinki, Helsinki, Finland

** P. Eerola, L. Forthomme, H. Kirschenmann, K. Osterberg, M. Voutilainen \cmsinstskip**Helsinki Institute of Physics, Helsinki, Finland

** F. Garcia, J. Havukainen, J.K. Heikkilä, T. Järvinen, V. Karimäki, R. Kinnunen, T. Lampén, K. Lassila-Perini, S. Laurila, S. Lehti, T. Lindén, P. Luukka, T. Mäenpää, H. Siikonen, E. Tuominen, J. Tuominiemi \cmsinstskip**Lappeenranta University of Technology, Lappeenranta, Finland

** T. Tuuva \cmsinstskip**IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France

** M. Besancon, F. Couderc, M. Dejardin, D. Denegri, B. Fabbro, J.L. Faure, F. Ferri, S. Ganjour, A. Givernaud, P. Gras, G. Hamel de Monchenault, P. Jarry, C. Leloup, E. Locci, J. Malcles, J. Rander, A. Rosowsky, M.Ö. Sahin, A. Savoy-Navarro\cmsAuthorMark13, M. Titov \cmsinstskip**Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris

** C. Amendola, F. Beaudette, P. Busson, C. Charlot, B. Diab, G. Falmagne, R. Granier de Cassagnac, I. Kucher, A. Lobanov, C. Martin Perez, M. Nguyen, C. Ochando, P. Paganini, J. Rembser, R. Salerno, J.B. Sauvan, Y. Sirois, A. Zabi, A. Zghiche \cmsinstskip**Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France

** J.-L. Agram\cmsAuthorMark14, J. Andrea, D. Bloch, G. Bourgatte, J.-M. Brom, E.C. Chabert, C. Collard, E. Conte\cmsAuthorMark14, J.-C. Fontaine\cmsAuthorMark14, D. Gelé, U. Goerlach, M. Jansová, A.-C. Le Bihan, N. Tonon, P. Van Hove \cmsinstskip**Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France

** S. Gadrat \cmsinstskip**Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France

** S. Beauceron, C. Bernet, G. Boudoul, C. Camen, N. Chanon, R. Chierici, D. Contardo, P. Depasse, H. El Mamouni, J. Fay, S. Gascon, M. Gouzevitch, B. Ille, Sa. Jain, F. Lagarde, I.B. Laktineh, H. Lattaud, M. Lethuillier, L. Mirabito, S. Perries, V. Sordini, G. Touquet, M. Vander Donckt, S. Viret \cmsinstskip**Georgian Technical University, Tbilisi, Georgia

** G. Adamov \cmsinstskip**Tbilisi State University, Tbilisi, Georgia

** Z. Tsamalaidze\cmsAuthorMark10 \cmsinstskip**RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany

** C. Autermann, L. Feld, M.K. Kiesel, K. Klein, M. Lipinski, D. Meuser, A. Pauls, M. Preuten, M.P. Rauch, C. Schomakers, J. Schulz, M. Teroerde, B. Wittmer \cmsinstskip**RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany

** A. Albert, M. Erdmann, S. Erdweg, T. Esch, B. Fischer, R. Fischer, S. Ghosh, T. Hebbeker, K. Hoepfner, H. Keller, L. Mastrolorenzo, M. Merschmeyer, A. Meyer, P. Millet, G. Mocellin, S. Mondal, S. Mukherjee, D. Noll, A. Novak, T. Pook, A. Pozdnyakov, T. Quast, M. Radziej, Y. Rath, H. Reithler, M. Rieger, J. Roemer, A. Schmidt, S.C. Schuler, A. Sharma, S. Thüer, S. Wiedenbeck \cmsinstskip**RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany

** G. Flügge, W. Haj Ahmad\cmsAuthorMark15, O. Hlushchenko, T. Kress, T. Müller, A. Nehrkorn, A. Nowack, C. Pistone, O. Pooth, D. Roy, H. Sert, A. Stahl\cmsAuthorMark16 \cmsinstskip**Deutsches Elektronen-Synchrotron, Hamburg, Germany

** M. Aldaya Martin, P. Asmuss, I. Babounikau, H. Bakhshiansohi, K. Beernaert, O. Behnke, U. Behrens, A. Bermúdez Martínez, D. Bertsche, A.A. Bin Anuar, K. Borras\cmsAuthorMark17, V. Botta, A. Campbell, A. Cardini, P. Connor, S. Consuegra Rodríguez, C. Contreras-Campana, V. Danilov, A. De Wit, M.M. Defranchis, C. Diez Pardos, D. Domínguez Damiani, G. Eckerlin, D. Eckstein, T. Eichhorn, A. Elwood, E. Eren, E. Gallo\cmsAuthorMark18, A. Geiser, J.M. Grados Luyando, A. Grohsjean, M. Guthoff, M. Haranko, A. Harb, A. Jafari, N.Z. Jomhari, H. Jung, A. Kasem\cmsAuthorMark17, M. Kasemann, H. Kaveh, J. Keaveney, C. Kleinwort, J. Knolle, D. Krücker, W. Lange, T. Lenz, J. Leonard, J. Lidrych, K. Lipka, W. Lohmann\cmsAuthorMark19, R. Mankel, I.-A. Melzer-Pellmann, A.B. Meyer, M. Meyer, M. Missiroli, G. Mittag, J. Mnich, A. Mussgiller, V. Myronenko, D. Pérez Adán, S.K. Pflitsch, D. Pitzl, A. Raspereza, A. Saibel, M. Savitskyi, V. Scheurer, P. Schütze, C. Schwanenberger, R. Shevchenko, A. Singh, H. Tholen, O. Turkot, A. Vagnerini, M. Van De Klundert, G.P. Van Onsem, R. Walsh, Y. Wen, K. Wichmann, C. Wissing, O. Zenaiev, R. Zlebcik \cmsinstskip**University of Hamburg, Hamburg, Germany

** R. Aggleton, S. Bein, L. Benato, A. Benecke, V. Blobel, T. Dreyer, A. Ebrahimi, A. Fröhlich, C. Garbers, E. Garutti, D. Gonzalez, P. Gunnellini, J. Haller, A. Hinzmann, A. Karavdina, G. Kasieczka, R. Klanner, R. Kogler, N. Kovalchuk, S. Kurz, V. Kutzner, J. Lange, T. Lange, A. Malara, D. Marconi, J. Multhaup, C.E.N. Niemeyer, D. Nowatschin, A. Perieanu, A. Reimers, O. Rieger, C. Scharf, P. Schleper, S. Schumann, J. Schwandt, J. Sonneveld, H. Stadie, G. Steinbrück, F.M. Stober, M. Stöver, B. Vormwald, I. Zoi \cmsinstskip**Karlsruher Institut fuer Technologie, Karlsruhe, Germany

** M. Akbiyik, C. Barth, M. Baselga, S. Baur, T. Berger, E. Butz, R. Caspart, T. Chwalek, W. De Boer, A. Dierlamm, K. El Morabit, N. Faltermann, M. Giffels, P. Goldenzweig, A. Gottmann, M.A. Harrendorf, F. Hartmann\cmsAuthorMark16, U. Husemann, S. Kudella, S. Mitra, M.U. Mozer, Th. Müller, M. Musich, A. Nürnberg, G. Quast, K. Rabbertz, M. Schröder, I. Shvetsov, H.J. Simonis, R. Ulrich, M. Weber, C. Wöhrmann, R. Wolf \cmsinstskip**Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece

** G. Anagnostou, P. Asenov, G. Daskalakis, T. Geralis, A. Kyriakis, D. Loukas, G. Paspalaki \cmsinstskip**National and Kapodistrian University of Athens, Athens, Greece

** M. Diamantopoulou, G. Karathanasis, P. Kontaxakis, A. Panagiotou, I. Papavergou, N. Saoulidou, A. Stakia, K. Theofilatos, K. Vellidis \cmsinstskip**National Technical University of Athens, Athens, Greece

** G. Bakas, K. Kousouris, I. Papakrivopoulos, G. Tsipolitis \cmsinstskip**University of Ioánnina, Ioánnina, Greece

** I. Evangelou, C. Foudas, P. Gianneios, P. Katsoulis, P. Kokkas, S. Mallios, K. Manitara, N. Manthos, I. Papadopoulos, J. Strologas, F.A. Triantis, D. Tsitsonis \cmsinstskip**MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary

** M. Bartók\cmsAuthorMark20, M. Csanad, P. Major, K. Mandal, A. Mehta, M.I. Nagy, G. Pasztor, O. Surányi, G.I. Veres \cmsinstskip**Wigner Research Centre for Physics, Budapest, Hungary

** G. Bencze, C. Hajdu, D. Horvath\cmsAuthorMark21, F. Sikler, T.Á. Vámi, V. Veszpremi, G. Vesztergombi${}^{\textrm{\textdagger}}$ \cmsinstskip**Institute of Nuclear Research ATOMKI, Debrecen, Hungary

** N. Beni, S. Czellar, J. Karancsi\cmsAuthorMark20, A. Makovec, J. Molnar, Z. Szillasi \cmsinstskip**Institute of Physics, University of Debrecen, Debrecen, Hungary

** P. Raics, D. Teyssier, Z.L. Trocsanyi, B. Ujvari \cmsinstskip**Eszterhazy Karoly University, Karoly Robert Campus, Gyongyos, Hungary

** T. Csorgo, W.J. Metzger, F. Nemes, T. Novak \cmsinstskip**Indian Institute of Science (IISc), Bangalore, India

** S. Choudhury, J.R. Komaragiri, P.C. Tiwari \cmsinstskip**National Institute of Science Education and Research, HBNI, Bhubaneswar, India

** S. Bahinipati\cmsAuthorMark23, C. Kar, G. Kole, P. Mal, V.K. Muraleedharan Nair Bindhu, A. Nayak\cmsAuthorMark24, D.K. Sahoo\cmsAuthorMark23, S.K. Swain \cmsinstskip**Panjab University, Chandigarh, India

** S. Bansal, S.B. Beri, V. Bhatnagar, S. Chauhan, R. Chawla, N. Dhingra, R. Gupta, A. Kaur, M. Kaur, S. Kaur, P. Kumari, M. Lohan, M. Meena, K. Sandeep, S. Sharma, J.B. Singh, A.K. Virdi, G. Walia \cmsinstskip**University of Delhi, Delhi, India

** A. Bhardwaj, B.C. Choudhary, R.B. Garg, M. Gola, S. Keshri, Ashok Kumar, S. Malhotra, M. Naimuddin, P. Priyanka, K. Ranjan, Aashaq Shah, R. Sharma \cmsinstskip**Saha Institute of Nuclear Physics, HBNI, Kolkata, India

** R. Bhardwaj\cmsAuthorMark25, M. Bharti\cmsAuthorMark25, R. Bhattacharya, S. Bhattacharya, U. Bhawandeep\cmsAuthorMark25, D. Bhowmik, S. Dey, S. Dutta, S. Ghosh, M. Maity\cmsAuthorMark26, K. Mondal, S. Nandan, A. Purohit, P.K. Rout, G. Saha, S. Sarkar, T. Sarkar\cmsAuthorMark26, M. Sharan, B. Singh\cmsAuthorMark25, S. Thakur\cmsAuthorMark25 \cmsinstskip**Indian Institute of Technology Madras, Madras, India

** P.K. Behera, P. Kalbhor, A. Muhammad, P.R. Pujahari, A. Sharma, A.K. Sikdar \cmsinstskip**Bhabha Atomic Research Centre, Mumbai, India

** R. Chudasama, D. Dutta, V. Jha, V. Kumar, D.K. Mishra, P.K. Netrakanti, L.M. Pant, P. Shukla \cmsinstskip**Tata Institute of Fundamental Research-A, Mumbai, India

** T. Aziz, M.A. Bhat, S. Dugad, G.B. Mohanty, N. Sur, RavindraKumar Verma \cmsinstskip**Tata Institute of Fundamental Research-B, Mumbai, India

** S. Banerjee, S. Bhattacharya, S. Chatterjee, P. Das, M. Guchait, S. Karmakar, S. Kumar, G. Majumder, K. Mazumdar, N. Sahoo, S. Sawant \cmsinstskip**Indian Institute of Science Education and Research (IISER), Pune, India

** S. Chauhan, S. Dube, V. Hegde, A. Kapoor, K. Kothekar, S. Pandey, A. Rane, A. Rastogi, S. Sharma \cmsinstskip**Institute for Research in Fundamental Sciences (IPM), Tehran, Iran

** S. Chenarani\cmsAuthorMark27, E. Eskandari Tadavani, S.M. Etesami\cmsAuthorMark27, M. Khakzad, M. Mohammadi Najafabadi, M. Naseri, F. Rezaei Hosseinabadi \cmsinstskip**University College Dublin, Dublin, Ireland

** M. Felcini, M. Grunewald \cmsinstskip**INFN Sezione di Bari a, Università di Bari b, Politecnico di Bari c, Bari, Italy

** M. Abbresciaa**,b, R. Alya**,b,\cmsAuthorMark28, C. Calabriaa**,b, A. Colaleoa, D. Creanzaa**,c, L. Cristellaa**,b, N. De Filippisa**,c, M. De Palmaa**,b, A. Di Florioa**,b, L. Fiorea, A. Gelmia**,b, G. Iasellia**,c, M. Incea**,b, S. Lezkia**,b, G. Maggia**,c, M. Maggia, G. Minielloa**,b, S. Mya**,b, S. Nuzzoa**,b, A. Pompilia**,b, G. Pugliesea**,c, R. Radognaa, A. Ranieria, G. Selvaggia**,b, L. Silvestrisa, R. Vendittia, P. Verwilligena \cmsinstskip**INFN Sezione di Bologna a, Università di Bologna b, Bologna, Italy

** G. Abbiendia, C. Battilanaa**,b, D. Bonacorsia**,b, L. Borgonovia**,b, S. Braibant-Giacomellia**,b, R. Campaninia**,b, P. Capiluppia**,b, A. Castroa**,b, F.R. Cavalloa, C. Cioccaa, G. Codispotia**,b, M. Cuffiania**,b, G.M. Dallavallea, F. Fabbria, A. Fanfania**,b, E. Fontanesi, P. Giacomellia, C. Grandia, L. Guiduccia**,b, F. Iemmia**,b, S. Lo Meoa**,\cmsAuthorMark29, S. Marcellinia, G. Masettia, F.L. Navarriaa**,b, A. Perrottaa, F. Primaveraa**,b, A.M. Rossia**,b, T. Rovellia**,b, G.P. Sirolia**,b, N. Tosia \cmsinstskip**INFN Sezione di Catania a, Università di Catania b, Catania, Italy

** S. Albergoa**,b,\cmsAuthorMark30, S. Costaa**,b, A. Di Mattiaa, R. Potenzaa**,b, A. Tricomia**,b,\cmsAuthorMark30, C. Tuve*a**,*b \cmsinstskip**INFN Sezione di Firenze a, Università di Firenze b, Firenze, Italy

** G. Barbaglia, R. Ceccarelli, K. Chatterjeea**,b, V. Ciullia**,b, C. Civininia, R. D’Alessandroa**,b, E. Focardia**,b, G. Latino, P. Lenzia**,b, M. Meschinia, S. Paolettia, G. Sguazzonia, D. Stroma, L. Viliania \cmsinstskip**INFN Laboratori Nazionali di Frascati, Frascati, Italy

** L. Benussi, S. Bianco, D. Piccolo \cmsinstskip**INFN Sezione di Genova a, Università di Genova b, Genova, Italy

** M. Bozzoa**,b, F. Ferroa, R. Mulargiaa**,b, E. Robuttia, S. Tosi*a**,*b \cmsinstskip**INFN Sezione di Milano-Bicocca a, Università di Milano-Bicocca b, Milano, Italy

** A. Benagliaa, A. Beschia**,b, F. Brivioa**,b, V. Cirioloa**,b,\cmsAuthorMark16, S. Di Guidaa**,b,\cmsAuthorMark16, M.E. Dinardoa**,b, P. Dinia, S. Fiorendia**,b, S. Gennaia, A. Ghezzia**,b, P. Govonia**,b, L. Guzzia**,b, M. Malbertia, S. Malvezzia, D. Menascea, F. Montia**,b, L. Moronia, G. Ortonaa**,b, M. Paganonia**,b, D. Pedrinia, S. Ragazzi*a**,b, T. Tabarelli de Fatisa**,b, D. Zuoloa**,*b \cmsinstskip**INFN Sezione di Napoli a, Università di Napoli ’Federico II’ b, Napoli, Italy, Università della Basilicata c, Potenza, Italy, Università G. Marconi d, Roma, Italy

** S. Buontempoa, N. Cavalloa**,c, A. De Iorioa**,b, A. Di Crescenzoa**,b, F. Fabozzia**,c, F. Fiengaa, G. Galatia, A.O.M. Iorioa**,b, L. Listaa**,b, S. Meolaa**,d,\cmsAuthorMark16, P. Paoluccia**,\cmsAuthorMark16, B. Rossia, C. Sciacca*a**,b, E. Voevodinaa**,*b \cmsinstskip**INFN Sezione di Padova a, Università di Padova b, Padova, Italy, Università di Trento c, Trento, Italy

** P. Azzia, N. Bacchettaa, D. Biselloa**,b, A. Bolettia**,b, A. Bragagnolo, R. Carlina**,b, P. Checchiaa, P. De Castro Manzanoa, T. Dorigoa, U. Dossellia, F. Gasparinia**,b, U. Gasparinia**,b, A. Gozzelinoa, S.Y. Hoh, P. Lujan, M. Margonia**,b, A.T. Meneguzzoa**,b, J. Pazzinia**,b, M. Presillab, P. Ronchese*a**,b, R. Rossina**,b, F. Simonettoa**,b, A. Tiko, M. Tosia**,b, M. Zanettia**,b, P. Zottoa**,b, G. Zumerlea**,*b \cmsinstskip**INFN Sezione di Pavia a, Università di Pavia b, Pavia, Italy

** A. Braghieria, P. Montagnaa**,b, S.P. Rattia**,b, V. Rea, M. Ressegottia**,b, C. Riccardia**,b, P. Salvinia, I. Vai*a**,b, P. Vituloa**,*b \cmsinstskip**INFN Sezione di Perugia a, Università di Perugia b, Perugia, Italy

** M. Biasinia**,b, G.M. Bileia, C. Cecchia**,b, D. Ciangottinia**,b, L. Fanòa**,b, P. Laricciaa**,b, R. Leonardia**,b, E. Manonia, G. Mantovania**,b, V. Mariania**,b, M. Menichellia, A. Rossia**,b, A. Santocchiaa**,b, D. Spigaa \cmsinstskip**INFN Sezione di Pisa a, Università di Pisa b, Scuola Normale Superiore di Pisa c, Pisa, Italy

** K. Androsova, P. Azzurria, G. Bagliesia, V. Bertacchia**,c, L. Bianchinia, T. Boccalia, R. Castaldia, M.A. Cioccia**,b, R. Dell’Orsoa, G. Fedia, L. Gianninia**,c, A. Giassia, M.T. Grippoa, F. Ligabuea**,c, E. Mancaa**,c, G. Mandorlia**,c, A. Messineoa**,b, F. Pallaa, A. Rizzia**,b, G. Rolandi\cmsAuthorMark31, S. Roy Chowdhury, A. Scribanoa, P. Spagnoloa, R. Tenchinia, G. Tonellia**,b, N. Turini, A. Venturia, P.G. Verdinia \cmsinstskip**INFN Sezione di Roma a, Sapienza Università di Roma b, Rome, Italy

** F. Cavallaria, M. Cipriania**,b, D. Del Rea**,b, E. Di Marcoa**,b, M. Diemoza, E. Longoa**,b, B. Marzocchia**,b, P. Meridiania, G. Organtinia**,b, F. Pandolfia, R. Paramattia**,b, C. Quarantaa**,b, S. Rahatloua**,b, C. Rovellia, F. Santanastasio*a**,b, L. Soffia**,*b \cmsinstskip**INFN Sezione di Torino a, Università di Torino b, Torino, Italy, Università del Piemonte Orientale c, Novara, Italy

** N. Amapanea**,b, R. Arcidiaconoa**,c, S. Argiroa**,b, M. Arneodoa**,c, N. Bartosika, R. Bellana**,b, C. Biinoa, A. Cappatia**,b, N. Cartigliaa, S. Comettia, M. Costaa**,b, R. Covarellia**,b, N. Demariaa, B. Kiania**,b, C. Mariottia, S. Masellia, E. Migliorea**,b, V. Monacoa**,b, E. Monteila**,b, M. Montenoa, M.M. Obertinoa**,b, L. Pachera**,b, N. Pastronea, M. Pelliccionia, G.L. Pinna Angionia**,b, A. Romeroa**,b, M. Ruspaa**,c, R. Sacchia**,b, R. Salvaticoa**,b, V. Solaa, A. Solanoa**,b, D. Soldia**,b, A. Staianoa \cmsinstskip**INFN Sezione di Trieste a, Università di Trieste b, Trieste, Italy

** S. Belfortea, V. Candelisea**,b, M. Casarsaa, F. Cossuttia, A. Da Rolda**,b, G. Della Riccaa**,b, F. Vazzolera**,b, A. Zanettia \cmsinstskip**Kyungpook National University, Daegu, Korea

** B. Kim, D.H. Kim, G.N. Kim, M.S. Kim, J. Lee, S.W. Lee, C.S. Moon, Y.D. Oh, S.I. Pak, S. Sekmen, D.C. Son, Y.C. Yang \cmsinstskip**Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea

** H. Kim, D.H. Moon, G. Oh \cmsinstskip**Hanyang University, Seoul, Korea

** B. Francois, T.J. Kim, J. Park \cmsinstskip**Korea University, Seoul, Korea

** S. Cho, S. Choi, Y. Go, D. Gyun, S. Ha, B. Hong, K. Lee, K.S. Lee, J. Lim, J. Park, S.K. Park, Y. Roh \cmsinstskip**Kyung Hee University, Department of Physics

** J. Goh \cmsinstskip**Sejong University, Seoul, Korea

** H.S. Kim \cmsinstskip**Seoul National University, Seoul, Korea

** J. Almond, J.H. Bhyun, J. Choi, S. Jeon, J. Kim, J.S. Kim, H. Lee, K. Lee, S. Lee, K. Nam, M. Oh, S.B. Oh, B.C. Radburn-Smith, U.K. Yang, H.D. Yoo, I. Yoon, G.B. Yu \cmsinstskip**University of Seoul, Seoul, Korea

** D. Jeon, H. Kim, J.H. Kim, J.S.H. Lee, I.C. Park, I. Watson \cmsinstskip**Sungkyunkwan University, Suwon, Korea

** Y. Choi, C. Hwang, Y. Jeong, J. Lee, Y. Lee, I. Yu \cmsinstskip**Riga Technical University, Riga, Latvia

** V. Veckalns\cmsAuthorMark32 \cmsinstskip**Vilnius University, Vilnius, Lithuania

** V. Dudenas, A. Juodagalvis, G. Tamulaitis, J. Vaitkus \cmsinstskip**National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia

** Z.A. Ibrahim, F. Mohamad Idris\cmsAuthorMark33, W.A.T. Wan Abdullah, M.N. Yusli, Z. Zolkapli \cmsinstskip**Universidad de Sonora (UNISON), Hermosillo, Mexico

** J.F. Benitez, A. Castaneda Hernandez, J.A. Murillo Quijada, L. Valencia Palomo \cmsinstskip**Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico

** H. Castilla-Valdez, E. De La Cruz-Burelo, I. Heredia-De La Cruz\cmsAuthorMark34, R. Lopez-Fernandez, A. Sanchez-Hernandez \cmsinstskip**Universidad Iberoamericana, Mexico City, Mexico

** S. Carrillo Moreno, C. Oropeza Barrera, M. Ramirez-Garcia, F. Vazquez Valencia \cmsinstskip**Benemerita Universidad Autonoma de Puebla, Puebla, Mexico

** J. Eysermans, I. Pedraza, H.A. Salazar Ibarguen, C. Uribe Estrada \cmsinstskip**Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico

** A. Morelos Pineda \cmsinstskip**University of Montenegro, Podgorica, Montenegro

** N. Raicevic \cmsinstskip**University of Auckland, Auckland, New Zealand

** D. Krofcheck \cmsinstskip**University of Canterbury, Christchurch, New Zealand

** S. Bheesette, P.H. Butler \cmsinstskip**National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan

** A. Ahmad, M. Ahmad, Q. Hassan, H.R. Hoorani, W.A. Khan, M.A. Shah, M. Shoaib, M. Waqas \cmsinstskip**AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Krakow, Poland

** V. Avati, L. Grzanka, M. Malawski \cmsinstskip**National Centre for Nuclear Research, Swierk, Poland

** H. Bialkowska, M. Bluj, B. Boimska, M. Górski, M. Kazana, M. Szleper, P. Zalewski \cmsinstskip**Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland

** K. Bunkowski, A. Byszuk\cmsAuthorMark35, K. Doroba, A. Kalinowski, M. Konecki, J. Krolikowski, M. Misiura, M. Olszewski, A. Pyskir, M. Walczak \cmsinstskip**Laboratório de Instrumentação e Física Experimental de Partículas, Lisboa, Portugal

** M. Araujo, P. Bargassa, D. Bastos, A. Di Francesco, P. Faccioli, B. Galinhas, M. Gallinaro, J. Hollar, N. Leonardo, J. Seixas, K. Shchelina, G. Strong, O. Toldaiev, J. Varela \cmsinstskip**Joint Institute for Nuclear Research, Dubna, Russia

** S. Afanasiev, P. Bunin, M. Gavrilenko, I. Golutvin, I. Gorbunov, A. Kamenev, V. Karjavine, A. Lanev, A. Malakhov, V. Matveev\cmsAuthorMark36*,*\cmsAuthorMark37, P. Moisenz, V. Palichik, V. Perelygin, M. Savina, S. Shmatov, S. Shulha, N. Skatchkov, V. Smirnov, N. Voytishin, A. Zarubin \cmsinstskip**Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia

** L. Chtchipounov, V. Golovtsov, Y. Ivanov, V. Kim\cmsAuthorMark38, E. Kuznetsova\cmsAuthorMark39, P. Levchenko, V. Murzin, V. Oreshkin, I. Smirnov, D. Sosnov, V. Sulimov, L. Uvarov, A. Vorobyev \cmsinstskip**Institute for Nuclear Research, Moscow, Russia

** Yu. Andreev, A. Dermenev, S. Gninenko, N. Golubev, A. Karneyeu, M. Kirsanov, N. Krasnikov, A. Pashenkov, D. Tlisov, A. Toropin \cmsinstskip**Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia

** V. Epshteyn, V. Gavrilov, N. Lychkovskaya, A. Nikitenko\cmsAuthorMark40, V. Popov, I. Pozdnyakov, G. Safronov, A. Spiridonov, A. Stepennov, M. Toms, E. Vlasov, A. Zhokin \cmsinstskip**Moscow Institute of Physics and Technology, Moscow, Russia

** T. Aushev \cmsinstskip**National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia

** R. Chistov\cmsAuthorMark41, M. Danilov\cmsAuthorMark41, A. Nigamova, P. Parygin, S. Polikarpov\cmsAuthorMark41, E. Tarkovskii \cmsinstskip**P.N. Lebedev Physical Institute, Moscow, Russia

** V. Andreev, M. Azarkin, I. Dremin, M. Kirakosyan, A. Terkulov \cmsinstskip**Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia

** A. Belyaev, E. Boos, M. Dubinin\cmsAuthorMark42, L. Dudko, A. Ershov, A. Gribushin, V. Klyukhin, O. Kodolova, I. Lokhtin, S. Obraztsov, S. Petrushanko, V. Savrin, A. Snigirev \cmsinstskip**Novosibirsk State University (NSU), Novosibirsk, Russia

** A. Barnyakov\cmsAuthorMark43, V. Blinov\cmsAuthorMark43, T. Dimova\cmsAuthorMark43, L. Kardapoltsev\cmsAuthorMark43, Y. Skovpen\cmsAuthorMark43 \cmsinstskip**Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’, Protvino, Russia

** I. Azhgirey, I. Bayshev, S. Bitioukov, V. Kachanov, D. Konstantinov, P. Mandrik, V. Petrov, R. Ryutin, S. Slabospitskii, A. Sobol, S. Troshin, N. Tyurin, A. Uzunian, A. Volkov \cmsinstskip**National Research Tomsk Polytechnic University, Tomsk, Russia

** A. Babaev, A. Iuzhakov, V. Okhotnikov \cmsinstskip**Tomsk State University, Tomsk, Russia

** V. Borchsh, V. Ivanchenko, E. Tcherniaev \cmsinstskip**University of Belgrade: Faculty of Physics and VINCA Institute of Nuclear Sciences

** P. Adzic\cmsAuthorMark44, P. Cirkovic, D. Devetak, M. Dordevic, P. Milenovic, J. Milosevic, M. Stojanovic \cmsinstskip**Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain

** M. Aguilar-Benitez, J. Alcaraz Maestre, A. Álvarez Fernández, I. Bachiller, M. Barrio Luna, J.A. Brochero Cifuentes, C.A. Carrillo Montoya, M. Cepeda, M. Cerrada, N. Colino, B. De La Cruz, A. Delgado Peris, C. Fernandez Bedoya, J.P. Fernández Ramos, J. Flix, M.C. Fouz, O. Gonzalez Lopez, S. Goy Lopez, J.M. Hernandez, M.I. Josa, D. Moran, Á. Navarro Tobar, A. Pérez-Calero Yzquierdo, J. Puerta Pelayo, I. Redondo, L. Romero, S. Sánchez Navas, M.S. Soares, A. Triossi, C. Willmott \cmsinstskip**Universidad Autónoma de Madrid, Madrid, Spain

** C. Albajar, J.F. de Trocóniz \cmsinstskip**Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Oviedo, Spain

** B. Alvarez Gonzalez, J. Cuevas, C. Erice, J. Fernandez Menendez, S. Folgueras, I. Gonzalez Caballero, J.R. González Fernández, E. Palencia Cortezon, V. Rodríguez Bouza, S. Sanchez Cruz \cmsinstskip**Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain

** I.J. Cabrillo, A. Calderon, B. Chazin Quero, J. Duarte Campderros, M. Fernandez, P.J. Fernández Manteca, A. García Alonso, G. Gomez, C. Martinez Rivero, P. Martinez Ruiz del Arbol, F. Matorras, J. Piedra Gomez, C. Prieels, T. Rodrigo, A. Ruiz-Jimeno, L. Russo\cmsAuthorMark45, L. Scodellaro, N. Trevisani, I. Vila, J.M. Vizan Garcia \cmsinstskip**University of Colombo, Colombo, Sri Lanka

** K. Malagalage \cmsinstskip**University of Ruhuna, Department of Physics, Matara, Sri Lanka

** W.G.D. Dharmaratna, N. Wickramage \cmsinstskip**CERN, European Organization for Nuclear Research, Geneva, Switzerland

** D. Abbaneo, B. Akgun, E. Auffray, G. Auzinger, J. Baechler, P. Baillon, A.H. Ball, D. Barney, J. Bendavid, M. Bianco, A. Bocci, P. Bortignon, E. Bossini, C. Botta, E. Brondolin, T. Camporesi, A. Caratelli, G. Cerminara, E. Chapon, G. Cucciati, D. d’Enterria, A. Dabrowski, N. Daci, V. Daponte, A. David, O. Davignon, A. De Roeck, N. Deelen, M. Deile, M. Dobson, M. Dünser, N. Dupont, A. Elliott-Peisert, F. Fallavollita\cmsAuthorMark46, D. Fasanella, G. Franzoni, J. Fulcher, W. Funk, S. Giani, D. Gigi, A. Gilbert, K. Gill, F. Glege, M. Gruchala, M. Guilbaud, D. Gulhan, J. Hegeman, C. Heidegger, Y. Iiyama, V. Innocente, P. Janot, O. Karacheban\cmsAuthorMark19, J. Kaspar, J. Kieseler, M. Krammer\cmsAuthorMark1, C. Lange, P. Lecoq, C. Lourenço, L. Malgeri, M. Mannelli, A. Massironi, F. Meijers, J.A. Merlin, S. Mersi, E. Meschi, F. Moortgat, M. Mulders, J. Ngadiuba, S. Nourbakhsh, S. Orfanelli, L. Orsini, F. Pantaleo\cmsAuthorMark16, L. Pape, E. Perez, M. Peruzzi, A. Petrilli, G. Petrucciani, A. Pfeiffer, M. Pierini, F.M. Pitters, D. Rabady, A. Racz, M. Rovere, H. Sakulin, C. Schäfer, C. Schwick, M. Selvaggi, A. Sharma, P. Silva, W. Snoeys, P. Sphicas\cmsAuthorMark47, J. Steggemann, V.R. Tavolaro, D. Treille, A. Tsirou, A. Vartak, M. Verzetti, W.D. Zeuner \cmsinstskip**Paul Scherrer Institut, Villigen, Switzerland

** L. Caminada\cmsAuthorMark48, K. Deiters, W. Erdmann, R. Horisberger, Q. Ingram, H.C. Kaestli, D. Kotlinski, U. Langenegger, T. Rohe, S.A. Wiederkehr \cmsinstskip**ETH Zurich - Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland

** M. Backhaus, P. Berger, N. Chernyavskaya, G. Dissertori, M. Dittmar, M. Donegà, C. Dorfer, T.A. Gómez Espinosa, C. Grab, D. Hits, T. Klijnsma, W. Lustermann, R.A. Manzoni, M. Marionneau, M.T. Meinhard, F. Micheli, P. Musella, F. Nessi-Tedaldi, F. Pauss, G. Perrin, L. Perrozzi, S. Pigazzini, M. Reichmann, C. Reissel, T. Reitenspiess, D. Ruini, D.A. Sanz Becerra, M. Schönenberger, L. Shchutska, M.L. Vesterbacka Olsson, R. Wallny, D.H. Zhu \cmsinstskip**Universität Zürich, Zurich, Switzerland

** T.K. Aarrestad, C. Amsler\cmsAuthorMark49, D. Brzhechko, M.F. Canelli, A. De Cosa, R. Del Burgo, S. Donato, B. Kilminster, S. Leontsinis, V.M. Mikuni, I. Neutelings, G. Rauco, P. Robmann, D. Salerno, K. Schweiger, C. Seitz, Y. Takahashi, S. Wertz, A. Zucchetta \cmsinstskip**National Central University, Chung-Li, Taiwan

** T.H. Doan, C.M. Kuo, W. Lin, A. Roy, S.S. Yu \cmsinstskip**National Taiwan University (NTU), Taipei, Taiwan

** P. Chang, Y. Chao, K.F. Chen, P.H. Chen, W.-S. Hou, Y.y. Li, R.-S. Lu, E. Paganis, A. Psallidas, A. Steen \cmsinstskip**Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand

** B. Asavapibhop, C. Asawatangtrakuldee, N. Srimanobhas, N. Suwonjandee \cmsinstskip**Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey

** A. Bat, F. Boran, S. Cerci\cmsAuthorMark50, S. Damarseckin\cmsAuthorMark51, Z.S. Demiroglu, F. Dolek, C. Dozen, I. Dumanoglu, G. Gokbulut, EmineGurpinar Guler\cmsAuthorMark52, Y. Guler, I. Hos\cmsAuthorMark53, C. Isik, E.E. Kangal\cmsAuthorMark54, O. Kara, A. Kayis Topaksu, U. Kiminsu, M. Oglakci, G. Onengut, K. Ozdemir\cmsAuthorMark55, S. Ozturk\cmsAuthorMark56, A.E. Simsek, D. Sunar Cerci\cmsAuthorMark50, U.G. Tok, S. Turkcapar, I.S. Zorbakir, C. Zorbilmez \cmsinstskip**Middle East Technical University, Physics Department, Ankara, Turkey

** B. Isildak\cmsAuthorMark57, G. Karapinar\cmsAuthorMark58, M. Yalvac \cmsinstskip**Bogazici University, Istanbul, Turkey

** I.O. Atakisi, E. Gülmez, M. Kaya\cmsAuthorMark59, O. Kaya\cmsAuthorMark60, B. Kaynak, Ö. Özçelik, S. Tekten, E.A. Yetkin\cmsAuthorMark61 \cmsinstskip**Istanbul Technical University, Istanbul, Turkey

** A. Cakir, K. Cankocak, Y. Komurcu, S. Sen\cmsAuthorMark62 \cmsinstskip**Istanbul University, Istanbul, Turkey

** S. Ozkorucuklu \cmsinstskip**Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine

** B. Grynyov \cmsinstskip**National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine

** L. Levchuk \cmsinstskip**University of Bristol, Bristol, United Kingdom

** F. Ball, E. Bhal, S. Bologna, J.J. Brooke, D. Burns, E. Clement, D. Cussans, H. Flacher, J. Goldstein, G.P. Heath, H.F. Heath, L. Kreczko, S. Paramesvaran, B. Penning, T. Sakuma, S. Seif El Nasr-Storey, D. Smith, V.J. Smith, J. Taylor, A. Titterton \cmsinstskip**Rutherford Appleton Laboratory, Didcot, United Kingdom

** K.W. Bell, A. Belyaev\cmsAuthorMark63, C. Brew, R.M. Brown, D. Cieri, D.J.A. Cockerill, J.A. Coughlan, K. Harder, S. Harper, J. Linacre, K. Manolopoulos, D.M. Newbold, E. Olaiya, D. Petyt, T. Reis, T. Schuh, C.H. Shepherd-Themistocleous, A. Thea, I.R. Tomalin, T. Williams, W.J. Womersley \cmsinstskip**Imperial College, London, United Kingdom

** R. Bainbridge, P. Bloch, J. Borg, S. Breeze, O. Buchmuller, A. Bundock, GurpreetSingh CHAHAL\cmsAuthorMark64, D. Colling, P. Dauncey, G. Davies, M. Della Negra, R. Di Maria, P. Everaerts, G. Hall, G. Iles, T. James, M. Komm, C. Laner, L. Lyons, A.-M. Magnan, S. Malik, A. Martelli, V. Milosevic, J. Nash\cmsAuthorMark65, V. Palladino, M. Pesaresi, D.M. Raymond, A. Richards, A. Rose, E. Scott, C. Seez, A. Shtipliyski, M. Stoye, T. Strebler, S. Summers, A. Tapper, K. Uchida, T. Virdee\cmsAuthorMark16, N. Wardle, D. Winterbottom, J. Wright, A.G. Zecchinelli, S.C. Zenz \cmsinstskip**Brunel University, Uxbridge, United Kingdom

** J.E. Cole, P.R. Hobson, A. Khan, P. Kyberd, C.K. Mackay, A. Morton, I.D. Reid, L. Teodorescu, S. Zahid \cmsinstskip**Baylor University, Waco, USA

** K. Call, J. Dittmann, K. Hatakeyama, C. Madrid, B. McMaster, N. Pastika, C. Smith \cmsinstskip**Catholic University of America, Washington, DC, USA

** R. Bartek, A. Dominguez, R. Uniyal \cmsinstskip**The University of Alabama, Tuscaloosa, USA

** A. Buccilli, S.I. Cooper, C. Henderson, P. Rumerio, C. West \cmsinstskip**Boston University, Boston, USA

** D. Arcaro, T. Bose, Z. Demiragli, D. Gastler, S. Girgis, D. Pinna, C. Richardson, J. Rohlf, D. Sperka, I. Suarez, L. Sulak, D. Zou \cmsinstskip**Brown University, Providence, USA

** G. Benelli, B. Burkle, X. Coubez, D. Cutts, Y.t. Duh, M. Hadley, J. Hakala, U. Heintz, J.M. Hogan\cmsAuthorMark66, K.H.M. Kwok, E. Laird, G. Landsberg, J. Lee, Z. Mao, M. Narain, S. Sagir\cmsAuthorMark67, R. Syarif, E. Usai, D. Yu \cmsinstskip**University of California, Davis, Davis, USA

** R. Band, C. Brainerd, R. Breedon, M. Calderon De La Barca Sanchez, M. Chertok, J. Conway, R. Conway, P.T. Cox, R. Erbacher, C. Flores, G. Funk, F. Jensen, W. Ko, O. Kukral, R. Lander, M. Mulhearn, D. Pellett, J. Pilot, M. Shi, D. Stolp, D. Taylor, K. Tos, M. Tripathi, Z. Wang, F. Zhang \cmsinstskip**University of California, Los Angeles, USA

** M. Bachtis, C. Bravo, R. Cousins, A. Dasgupta, A. Florent, J. Hauser, M. Ignatenko, N. Mccoll, W.A. Nash, S. Regnard, D. Saltzberg, C. Schnaible, B. Stone, V. Valuev \cmsinstskip**University of California, Riverside, Riverside, USA

** K. Burt, R. Clare, J.W. Gary, S.M.A. Ghiasi Shirazi, G. Hanson, G. Karapostoli, E. Kennedy, O.R. Long, M. Olmedo Negrete, M.I. Paneva, W. Si, L. Wang, H. Wei, S. Wimpenny, B.R. Yates, Y. Zhang \cmsinstskip**University of California, San Diego, La Jolla, USA

** J.G. Branson, P. Chang, S. Cittolin, M. Derdzinski, R. Gerosa, D. Gilbert, B. Hashemi, D. Klein, V. Krutelyov, J. Letts, M. Masciovecchio, S. May, S. Padhi, M. Pieri, V. Sharma, M. Tadel, F. Würthwein, A. Yagil, G. Zevi Della Porta \cmsinstskip**University of California, Santa Barbara - Department of Physics, Santa Barbara, USA

** N. Amin, R. Bhandari, C. Campagnari, M. Citron, V. Dutta, M. Franco Sevilla, L. Gouskos, J. Incandela, B. Marsh, H. Mei, A. Ovcharova, H. Qu, J. Richman, U. Sarica, D. Stuart, S. Wang, J. Yoo \cmsinstskip**California Institute of Technology, Pasadena, USA

** D. Anderson, A. Bornheim, O. Cerri, I. Dutta, J.M. Lawhorn, N. Lu, J. Mao, H.B. Newman, T.Q. Nguyen, J. Pata, M. Spiropulu, J.R. Vlimant, S. Xie, Z. Zhang, R.Y. Zhu \cmsinstskip**Carnegie Mellon University, Pittsburgh, USA

** M.B. Andrews, T. Ferguson, T. Mudholkar, M. Paulini, M. Sun, I. Vorobiev, M. Weinberg \cmsinstskip**University of Colorado Boulder, Boulder, USA

** J.P. Cumalat, W.T. Ford, A. Johnson, E. MacDonald, T. Mulholland, R. Patel, A. Perloff, K. Stenson, K.A. Ulmer, S.R. Wagner \cmsinstskip**Cornell University, Ithaca, USA

** J. Alexander, J. Chaves, Y. Cheng, J. Chu, A. Datta, A. Frankenthal, K. Mcdermott, N. Mirman, J.R. Patterson, D. Quach, A. Rinkevicius\cmsAuthorMark68, A. Ryd, S.M. Tan, Z. Tao, J. Thom, P. Wittich, M. Zientek \cmsinstskip**Fermi National Accelerator Laboratory, Batavia, USA

** S. Abdullin, M. Albrow, M. Alyari, G. Apollinari, A. Apresyan, A. Apyan, S. Banerjee, L.A.T. Bauerdick, A. Beretvas, J. Berryhill, P.C. Bhat, K. Burkett, J.N. Butler, A. Canepa, G.B. Cerati, H.W.K. Cheung, F. Chlebana, M. Cremonesi, J. Duarte, V.D. Elvira, J. Freeman, Z. Gecse, E. Gottschalk, L. Gray, D. Green, S. Grünendahl, O. Gutsche, AllisonReinsvold Hall, J. Hanlon, R.M. Harris, S. Hasegawa, R. Heller, J. Hirschauer, B. Jayatilaka, S. Jindariani, M. Johnson, U. Joshi, B. Klima, M.J. Kortelainen, B. Kreis, S. Lammel, J. Lewis, D. Lincoln, R. Lipton, M. Liu, T. Liu, J. Lykken, K. Maeshima, J.M. Marraffino, D. Mason, P. McBride, P. Merkel, S. Mrenna, S. Nahn, V. O’Dell, V. Papadimitriou, K. Pedro, C. Pena, G. Rakness, F. Ravera, L. Ristori, B. Schneider, E. Sexton-Kennedy, N. Smith, A. Soha, W.J. Spalding, L. Spiegel, S. Stoynev, J. Strait, N. Strobbe, L. Taylor, S. Tkaczyk, N.V. Tran, L. Uplegger, E.W. Vaandering, C. Vernieri, M. Verzocchi, R. Vidal, M. Wang, H.A. Weber \cmsinstskip**University of Florida, Gainesville, USA

** D. Acosta, P. Avery, D. Bourilkov, A. Brinkerhoff, L. Cadamuro, A. Carnes, V. Cherepanov, D. Curry, F. Errico, R.D. Field, S.V. Gleyzer, B.M. Joshi, M. Kim, J. Konigsberg, A. Korytov, K.H. Lo, P. Ma, K. Matchev, N. Menendez, G. Mitselmakher, D. Rosenzweig, K. Shi, J. Wang, S. Wang, X. Zuo \cmsinstskip**Florida International University, Miami, USA

** Y.R. Joshi \cmsinstskip**Florida State University, Tallahassee, USA

** T. Adams, A. Askew, S. Hagopian, V. Hagopian, K.F. Johnson, R. Khurana, T. Kolberg, G. Martinez, T. Perry, H. Prosper, C. Schiber, R. Yohay, J. Zhang \cmsinstskip**Florida Institute of Technology, Melbourne, USA

** M.M. Baarmand, V. Bhopatkar, M. Hohlmann, D. Noonan, M. Rahmani, M. Saunders, F. Yumiceva \cmsinstskip**University of Illinois at Chicago (UIC), Chicago, USA

** M.R. Adams, L. Apanasevich, D. Berry, R.R. Betts, R. Cavanaugh, X. Chen, S. Dittmer, O. Evdokimov, C.E. Gerber, D.A. Hangal, D.J. Hofman, K. Jung, C. Mills, T. Roy, M.B. Tonjes, N. Varelas, H. Wang, X. Wang, Z. Wu \cmsinstskip**The University of Iowa, Iowa City, USA

** M. Alhusseini, B. Bilki\cmsAuthorMark52, W. Clarida, K. Dilsiz\cmsAuthorMark69, S. Durgut, R.P. Gandrajula, M. Haytmyradov, V. Khristenko, O.K. Köseyan, J.-P. Merlo, A. Mestvirishvili\cmsAuthorMark70, A. Moeller, J. Nachtman, H. Ogul\cmsAuthorMark71, Y. Onel, F. Ozok\cmsAuthorMark72, A. Penzo, C. Snyder, E. Tiras, J. Wetzel \cmsinstskip**Johns Hopkins University, Baltimore, USA

** B. Blumenfeld, A. Cocoros, N. Eminizer, D. Fehling, L. Feng, A.V. Gritsan, W.T. Hung, P. Maksimovic, J. Roskes, M. Swartz, M. Xiao \cmsinstskip**The University of Kansas, Lawrence, USA

** C. Baldenegro Barrera, P. Baringer, A. Bean, S. Boren, J. Bowen, A. Bylinkin, T. Isidori, S. Khalil, J. King, G. Krintiras, A. Kropivnitskaya, C. Lindsey, D. Majumder, W. Mcbrayer, N. Minafra, M. Murray, C. Rogan, C. Royon, S. Sanders, E. Schmitz, J.D. Tapia Takaki, Q. Wang, J. Williams, G. Wilson \cmsinstskip**Kansas State University, Manhattan, USA

** S. Duric, A. Ivanov, K. Kaadze, D. Kim, Y. Maravin, D.R. Mendis, T. Mitchell, A. Modak, A. Mohammadi \cmsinstskip**Lawrence Livermore National Laboratory, Livermore, USA

** F. Rebassoo, D. Wright \cmsinstskip**University of Maryland, College Park, USA

** A. Baden, O. Baron, A. Belloni, S.C. Eno, Y. Feng, N.J. Hadley, S. Jabeen, G.Y. Jeng, R.G. Kellogg, J. Kunkle, A.C. Mignerey, S. Nabili, F. Ricci-Tam, M. Seidel, Y.H. Shin, A. Skuja, S.C. Tonwar, K. Wong \cmsinstskip**Massachusetts Institute of Technology, Cambridge, USA

** D. Abercrombie, B. Allen, A. Baty, R. Bi, S. Brandt, W. Busza, I.A. Cali, M. D’Alfonso, G. Gomez Ceballos, M. Goncharov, P. Harris, D. Hsu, M. Hu, M. Klute, D. Kovalskyi, Y.-J. Lee, P.D. Luckey, B. Maier, A.C. Marini, C. Mcginn, C. Mironov, S. Narayanan, X. Niu, C. Paus, D. Rankin, C. Roland, G. Roland, Z. Shi, G.S.F. Stephans, K. Sumorok, K. Tatar, D. Velicanu, J. Wang, T.W. Wang, B. Wyslouch \cmsinstskip**University of Minnesota, Minneapolis, USA

** A.C. Benvenuti${}^{\textrm{\textdagger}}$, R.M. Chatterjee, A. Evans, S. Guts, P. Hansen, J. Hiltbrand, Sh. Jain, S. Kalafut, Y. Kubota, Z. Lesko, J. Mans, R. Rusack, M.A. Wadud \cmsinstskip**University of Mississippi, Oxford, USA

** J.G. Acosta, S. Oliveros \cmsinstskip**University of Nebraska-Lincoln, Lincoln, USA

** K. Bloom, D.R. Claes, C. Fangmeier, L. Finco, F. Golf, R. Gonzalez Suarez, R. Kamalieddin, I. Kravchenko, J.E. Siado, G.R. Snow, B. Stieger \cmsinstskip**State University of New York at Buffalo, Buffalo, USA

** G. Agarwal, C. Harrington, I. Iashvili, A. Kharchilava, C. Mclean, D. Nguyen, A. Parker, J. Pekkanen, S. Rappoccio, B. Roozbahani \cmsinstskip**Northeastern University, Boston, USA

** G. Alverson, E. Barberis, C. Freer, Y. Haddad, A. Hortiangtham, G. Madigan, D.M. Morse, T. Orimoto, L. Skinnari, A. Tishelman-Charny, T. Wamorkar, B. Wang, A. Wisecarver, D. Wood \cmsinstskip**Northwestern University, Evanston, USA

** S. Bhattacharya, J. Bueghly, T. Gunter, K.A. Hahn, N. Odell, M.H. Schmitt, K. Sung, M. Trovato, M. Velasco \cmsinstskip**University of Notre Dame, Notre Dame, USA

** R. Bucci, N. Dev, R. Goldouzian, M. Hildreth, K. Hurtado Anampa, C. Jessop, D.J. Karmgard, K. Lannon, W. Li, N. Loukas, N. Marinelli, I. Mcalister, F. Meng, C. Mueller, Y. Musienko\cmsAuthorMark36, M. Planer, R. Ruchti, P. Siddireddy, G. Smith, S. Taroni, M. Wayne, A. Wightman, M. Wolf, A. Woodard \cmsinstskip**The Ohio State University, Columbus, USA

** J. Alimena, B. Bylsma, L.S. Durkin, S. Flowers, B. Francis, C. Hill, W. Ji, A. Lefeld, T.Y. Ling, B.L. Winer \cmsinstskip**Princeton University, Princeton, USA

** S. Cooperstein, G. Dezoort, P. Elmer, J. Hardenbrook, N. Haubrich, S. Higginbotham, A. Kalogeropoulos, S. Kwan, D. Lange, M.T. Lucchini, J. Luo, D. Marlow, K. Mei, I. Ojalvo, J. Olsen, C. Palmer, P. Piroué, J. Salfeld-Nebgen, D. Stickland, C. Tully, Z. Wang \cmsinstskip**University of Puerto Rico, Mayaguez, USA

** S. Malik, S. Norberg \cmsinstskip**Purdue University, West Lafayette, USA

** A. Barker, V.E. Barnes, S. Das, L. Gutay, M. Jones, A.W. Jung, A. Khatiwada, B. Mahakud, D.H. Miller, G. Negro, N. Neumeister, C.C. Peng, S. Piperov, H. Qiu, J.F. Schulte, J. Sun, F. Wang, R. Xiao, W. Xie \cmsinstskip**Purdue University Northwest, Hammond, USA

** T. Cheng, J. Dolen, N. Parashar \cmsinstskip**Rice University, Houston, USA

** K.M. Ecklund, S. Freed, F.J.M. Geurts, M. Kilpatrick, Arun Kumar, W. Li, B.P. Padley, R. Redjimi, J. Roberts, J. Rorie, W. Shi, A.G. Stahl Leiton, Z. Tu, A. Zhang \cmsinstskip**University of Rochester, Rochester, USA

** A. Bodek, P. de Barbaro, R. Demina, J.L. Dulemba, C. Fallon, T. Ferbel, M. Galanti, A. Garcia-Bellido, J. Han, O. Hindrichs, A. Khukhunaishvili, E. Ranken, P. Tan, R. Taus \cmsinstskip**Rutgers, The State University of New Jersey, Piscataway, USA

** B. Chiarito, J.P. Chou, A. Gandrakota, Y. Gershtein, E. Halkiadakis, A. Hart, M. Heindl, E. Hughes, S. Kaplan, S. Kyriacou, I. Laflotte, A. Lath, R. Montalvo, K. Nash, M. Osherson, H. Saka, S. Salur, S. Schnetzer, D. Sheffield, S. Somalwar, R. Stone, S. Thomas, P. Thomassen \cmsinstskip**University of Tennessee, Knoxville, USA

** H. Acharya, A.G. Delannoy, J. Heideman, G. Riley, S. Spanier \cmsinstskip**Texas A&M University, College Station, USA

** O. Bouhali\cmsAuthorMark73, A. Celik, M. Dalchenko, M. De Mattia, A. Delgado, S. Dildick, R. Eusebi, J. Gilmore, T. Huang, T. Kamon\cmsAuthorMark74, S. Luo, D. Marley, R. Mueller, D. Overton, L. Perniè, D. Rathjens, A. Safonov \cmsinstskip**Texas Tech University, Lubbock, USA

** N. Akchurin, J. Damgov, F. De Guio, S. Kunori, K. Lamichhane, S.W. Lee, T. Mengke, S. Muthumuni, T. Peltola, S. Undleeb, I. Volobouev, Z. Wang, A. Whitbeck \cmsinstskip**Vanderbilt University, Nashville, USA

** S. Greene, A. Gurrola, R. Janjam, W. Johns, C. Maguire, A. Melo, H. Ni, K. Padeken, F. Romeo, P. Sheldon, S. Tuo, J. Velkovska, M. Verweij \cmsinstskip**University of Virginia, Charlottesville, USA

** M.W. Arenton, P. Barria, B. Cox, G. Cummings, R. Hirosky, M. Joyce, A. Ledovskoy, C. Neu, B. Tannenwald, Y. Wang, E. Wolfe, F. Xia \cmsinstskip**Wayne State University, Detroit, USA

** R. Harr, P.E. Karchin, N. Poudyal, J. Sturdy, P. Thapa, S. Zaleski \cmsinstskip**University of Wisconsin - Madison, Madison, WI, USA

** J. Buchanan, C. Caillol, D. Carlsmith, S. Dasu, I. De Bruyn, L. Dodd, F. Fiori, C. Galloni, B. Gomber\cmsAuthorMark75, H. He, M. Herndon, A. Hervé, U. Hussain, P. Klabbers, A. Lanaro, A. Loeliger, K. Long, R. Loveless, J. Madhusudanan Sreekala, T. Ruggles, A. Savin, V. Sharma, W.H. Smith, D. Teague, S. Trembath-reichert, N. Woods \cmsinstskip†: Deceased

1: Also at Vienna University of Technology, Vienna, Austria

2: Also at IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France

3: Also at Universidade Estadual de Campinas, Campinas, Brazil

4: Also at Federal University of Rio Grande do Sul, Porto Alegre, Brazil

5: Also at UFMS, Nova Andradina, Brazil

6: Also at Universidade Federal de Pelotas, Pelotas, Brazil

7: Also at Université Libre de Bruxelles, Bruxelles, Belgium

8: Also at University of Chinese Academy of Sciences, Beijing, China

9: Also at Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia

10: Also at Joint Institute for Nuclear Research, Dubna, Russia

11: Also at Suez University, Suez, Egypt

12: Now at British University in Egypt, Cairo, Egypt

13: Also at Purdue University, West Lafayette, USA

14: Also at Université de Haute Alsace, Mulhouse, France

15: Also at Erzincan Binali Yildirim University, Erzincan, Turkey

16: Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland

17: Also at RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany

18: Also at University of Hamburg, Hamburg, Germany

19: Also at Brandenburg University of Technology, Cottbus, Germany

20: Also at Institute of Physics, University of Debrecen, Debrecen, Hungary, Debrecen, Hungary

21: Also at Institute of Nuclear Research ATOMKI, Debrecen, Hungary

22: Also at MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary, Budapest, Hungary

23: Also at IIT Bhubaneswar, Bhubaneswar, India, Bhubaneswar, India

24: Also at Institute of Physics, Bhubaneswar, India

25: Also at Shoolini University, Solan, India

26: Also at University of Visva-Bharati, Santiniketan, India

27: Also at Isfahan University of Technology, Isfahan, Iran

28: Now at INFN Sezione di Bari a, Università di Bari b, Politecnico di Bari c, Bari, Italy

29: Also at Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Bologna, Italy

30: Also at Centro Siciliano di Fisica Nucleare e di Struttura Della Materia, Catania, Italy

31: Also at Scuola Normale e Sezione dell’INFN, Pisa, Italy

32: Also at Riga Technical University, Riga, Latvia, Riga, Latvia

33: Also at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia

34: Also at Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico

35: Also at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland

36: Also at Institute for Nuclear Research, Moscow, Russia

37: Now at National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia

38: Also at St. Petersburg State Polytechnical University, St. Petersburg, Russia

39: Also at University of Florida, Gainesville, USA

40: Also at Imperial College, London, United Kingdom

41: Also at P.N. Lebedev Physical Institute, Moscow, Russia

42: Also at California Institute of Technology, Pasadena, USA

43: Also at Budker Institute of Nuclear Physics, Novosibirsk, Russia

44: Also at Faculty of Physics, University of Belgrade, Belgrade, Serbia

45: Also at Università degli Studi di Siena, Siena, Italy

46: Also at INFN Sezione di Pavia a, Università di Pavia b, Pavia, Italy, Pavia, Italy

47: Also at National and Kapodistrian University of Athens, Athens, Greece

48: Also at Universität Zürich, Zurich, Switzerland

49: Also at Stefan Meyer Institute for Subatomic Physics, Vienna, Austria, Vienna, Austria

50: Also at Adiyaman University, Adiyaman, Turkey

51: Also at Şırnak University, Sirnak, Turkey

52: Also at Beykent University, Istanbul, Turkey, Istanbul, Turkey

53: Also at Istanbul Aydin University, Istanbul, Turkey

54: Also at Mersin University, Mersin, Turkey

55: Also at Piri Reis University, Istanbul, Turkey

56: Also at Gaziosmanpasa University, Tokat, Turkey

57: Also at Ozyegin University, Istanbul, Turkey

58: Also at Izmir Institute of Technology, Izmir, Turkey

59: Also at Marmara University, Istanbul, Turkey

60: Also at Kafkas University, Kars, Turkey

61: Also at Istanbul Bilgi University, Istanbul, Turkey

62: Also at Hacettepe University, Ankara, Turkey

63: Also at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom

64: Also at IPPP Durham University, Durham, United Kingdom

65: Also at Monash University, Faculty of Science, Clayton, Australia

66: Also at Bethel University, St. Paul, Minneapolis, USA, St. Paul, USA

67: Also at Karamanoğlu Mehmetbey University, Karaman, Turkey

68: Also at Vilnius University, Vilnius, Lithuania

69: Also at Bingol University, Bingol, Turkey

70: Also at Georgian Technical University, Tbilisi, Georgia

71: Also at Sinop University, Sinop, Turkey

72: Also at Mimar Sinan University, Istanbul, Istanbul, Turkey

73: Also at Texas A&M University at Qatar, Doha, Qatar

74: Also at Kyungpook National University, Daegu, Korea, Daegu, Korea

75: Also at University of Hyderabad, Hyderabad, India