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 ${m_{\mathrm{H}}} =$ 125.78 $\pm$ 0.26 GeV. This is combined with a measurement of ${m_{\mathrm{H}}}$ already performed in the $\mathrm{H \to ZZ \to 4 \ell}$ decay channel using the same data set, giving ${m_{\mathrm{H}}} =$ 125.46 $\pm$ 0.16 GeV. This result, when further combined with an earlier measurement of ${m_{\mathrm{H}}}$ using data collected in 2011 and 2012 with the CMS detector, gives a value for the Higgs boson mass of ${m_{\mathrm{H}}} =$ 125.38 $\pm$ 0.14 GeV. This is currently the most precise measurement of the mass of the Higgs boson.

Log in to your administrator account to edit.