Measurement of the Z boson differential production cross section using its invisible decay mode (Z $\to$ $\nu\bar{\nu}$) in proton-proton collisions at $\sqrt{s} =$ 13 TeV

TL;DR

This paper reports on the measurement of the Z boson production cross section in its invisible decay mode at 13 TeV, providing insights into Z boson behavior and testing the Standard Model predictions using CMS data.

Contribution

It presents the first detailed measurement of the Z boson differential cross section in the invisible decay channel at 13 TeV, combining with previous charged-lepton decay data for comprehensive analysis.

Findings

Total fiducial cross section for Z with pT > 200 GeV is 3000 fb.

Differential cross section as a function of Z boson transverse momentum is provided.

Results agree with Standard Model predictions.

Abstract

Measurements of the total and differential fiducial cross sections for the Z boson decaying into two neutrinos are presented at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were collected by the CMS detector in 2016 and correspond to an integrated luminosity of 35.9 fb$^{-1}$. In these measurements, events are selected containing an imbalance in transverse momentum and one or more energetic jets. The fiducial differential cross section is measured as a function of the Z boson transverse momentum. The results are combined with a previous measurement of charged-lepton decays of the Z boson. The measured total fiducial cross section for events with Z boson transverse momentum greater than 200 GeV is 3000 $^{+180}_{-170}$ fb.