CMS-PAS-HIG-19-006

CMS-PAS-HIG-19-006
Measurement of Higgs boson decay to a pair of muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
CMS Collaboration
July 2020

Abstract: A measurement of the Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a weak vector boson, and in association with a pair of top quarks. The measurement is performed using $\sqrt{s}=$ 13 TeV proton-proton (pp) collision data, corresponding to an integrated luminosity of 137 fb$^{-1}$, recorded by the CMS experiment at the CERN LHC. An excess of events is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with $ m_{\mathrm{H}} = $ 125.38 GeV is 2.5. The measured signal strength, relative to the SM expectation, is 1.19$^{+0.41}_{-0.39}$ (stat) $^{+0.17}_{-0.16}$ (syst). The combination of this result with that from data recorded at centre-of-mass energies of 7 and 8 TeV improves both expected and observed sensitivity by 1%. This result constitutes the first evidence for the Higgs boson decay to fermions of the second generation.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, JHEP 01 (2021) 148. The superseded preliminary plots can be found here.

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