CMS-PAS-SMP-22-017

CMS-PAS-SMP-22-017
Measurement of the inclusive cross section of Z boson production in pp collisions at $\sqrt{s}=$ 13.6 TeV
CMS Collaboration
21 August 2023

Abstract: A measurement of the Z boson production cross section in proton-proton collisions at a center-of-mass energy of 13.6 TeV is presented for Z bosons decaying to a pair of muons. Data collected in 2022 and corresponding to an integrated luminosity of 5.04 fb $^{-1}$ with two identified muons in the final state are used to extract a value for the product of the signal cross section and branching fraction. The measurement is done in a fiducial region defined by the kinematical acceptance of the CMS detector and extrapolated to the full phase space resulting in a total cross section for Z boson production in the muonic decay channel with an invariant dimuon mass in the range of 60 to 120GeV of $\sigma(\mathrm{pp} \rightarrow \mathrm{Z + X})\mathcal{B}(\mathrm{Z} \rightarrow \mu^{+}\mu^{-}) =$ ( 2.010 $\pm$ 0.001 (stat) $\pm$ 0.018 (syst) $\pm$ 0.046 (lumi) $\pm$ 0.007 (theo) ) nb. The fiducial as well as the extrapolated total result are both dominated by systematic uncertainties and are in agreement with theoretical predictions, calculated at next-to-next-to-leading order accuracy in quantum chromodynamics and recent parton distribution functions.
Links: CDS record (PDF) ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

CMS Publications