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Compact Muon Solenoid
LHC, CERN

CMS-PAS-TOP-22-012
First measurement of the top quark pair production cross section in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV
Abstract: The first measurement of the top quark pair ($ \mathrm{t\bar{t}} $) production cross section in proton-proton collisions at $ \sqrt{s}= $ 13.6 TeV is presented. Data recorded with the CMS detector at the CERN LHC in July and August 2022 corresponding to an integrated luminosity of 1.20 $ \pm $ 0.07 fb$ ^{-1} $ are analyzed. Events are selected with one or two charged leptons (electrons and muons) and additional jets. A maximum likelihood fit is performed to event categories defined by the number and flavors of the leptons, and the number of jets and jets identified as originating from the decay of b hadrons. An inclusive $ \mathrm{t\bar{t}} $ production cross section of 887 $ ^{+43}_{-41} $ (stat+syst) $ \pm $ 53 (lumi) pb is measured, in agreement with the standard model prediction of 921 $ ^{+29}_{-37} $ pb.
CMS Publications
Compact Muon Solenoid
LHC, CERN