Production of dark matter in association with a Higgs boson via exclusive photon fusion in $pp$ collisions at $\sqrt{s}=13$ TeV

TL;DR

This paper investigates the production of dark matter particles alongside a Higgs boson through exclusive photon fusion at the LHC, proposing a novel detection method using forward proton detectors within an extended Standard Model framework.

Contribution

It introduces a new study of dark matter-Higgs associated production via photon fusion in the IDMS model, highlighting potential detection at the LHC with forward proton detectors.

Findings

Analysis of the phase space parameter $\Delta$ for different mass configurations.

Potential for detecting dark matter via missing mass spectrum at the LHC.

Extension of the Standard Model with a $U(1)_X$ symmetry and inert scalar doublet.

Abstract

In this work we study the production of a dark matter (DM) particle in association with a Higgs boson via a central exclusive photon-fusion initiated process. We explore this type of production through the Inert Doublet Model plus a complex Singlet (IDMS), where an extension of the Standard Model by an additional $U(1)_X$ gauge symmetry and a $SU(2)$ inert scalar doublet gives rise to a DM candidate $\chi$. This particular process involves the collision of two protons exchanging two colorless particles (in our case, photons), from which a central process occurs. Such interaction can be detected in the LHC using forward proton detectors, where the resulting missing mass spectrum can be observed after proton reconstruction, thus allowing a search for physics Beyond the Standard Model (BSM). We present results for different values of the difference of masses of a heavy scalar coming from the complex singlet, the DM candidate and the Higgs boson, $\Delta = M_S - M_\chi - M_h$, which is the phase space available for the final state in the central exclusive process.