A measurement of the Higgs boson mass in the diphoton decay channel

2020 
Abstract A measurement of the mass of the Higgs boson in the diphoton decay channel is presented. This analysis is based on 35.9 fb − 1 of proton-proton collision data collected during the 2016 LHC running period, with the CMS detector at a center-of-mass energy of 13 TeV. A refined detector calibration and new analysis techniques have been used to improve the precision of this measurement. The Higgs boson mass is measured to be m H = 125.78 ± 0.26 GeV . This is combined with a measurement of m H already performed in the H → ZZ → 4 l decay channel using the same data set, giving m H = 125.46 ± 0.16 GeV . This result, when further combined with an earlier measurement of m H using data collected in 2011 and 2012 with the CMS detector, gives a value for the Higgs boson mass of m H = 125.38 ± 0.14 GeV . This is currently the most precise measurement of the mass of the Higgs boson.
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