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Compact Muon Solenoid
LHC, CERN

CMS-PAS-HIG-21-012
Inclusive search for a boosted Higgs boson and an observation of the Z boson decaying to charm quark pair in proton-proton collisions at s= 13 TeV
Abstract: A search for the standard model Higgs (H) boson produced with transverse momentum greater than 450 GeV and decaying to charm quark-antiquark pairs (cˉc) is performed using proton-proton collision data collected by the CMS experiment at the LHC at s= 13 TeV. The data sample corresponds to an integrated luminosity of 138 fb1. The search is inclusive in H production mode. Highly Lorentz-boosted H decaying to cˉc are reconstructed as single large-radius jets, and are identified using a dedicated charm tagging technique based on a deep neural network. The method is validated with the Zcˉc decay process, which is observed for the first time in the Z+jets production mode at a hadron collider with a significance of well over 5 standard deviations and a signal strength of 0.91+0.180.15 (exp.) ± 0.7 (th.) ± 0.05 (stat.) relative to the standard model prediction. A 95% confidence level observed (expected) upper limit is set on the Hcˉc signal strength of 45 (38) times the standard model prediction.
CMS Publications
Compact Muon Solenoid
LHC, CERN