Measurements of Higgs boson production and properties in the di-photon decay channel using the CMS detector

The Higgs boson production is observed in the diphoton channel with$12.9~\textrm{fb}^{-1}$ of proton-proton collision data collected by the LHC in 2016 at centre-of-massenergy of $13~\textrm{TeV}$. A maximum significance of $6.1~\sigma$ is measured at $126.0~\mathrm{GeV}$, with a best-fit signal strength relative to the standard model prediction of $0.95 \pm 0.20 = 0.95 \pm 0.17 \text{~(stat)~}^{+0.10}_{-0.07} \text{~(syst)~}^{+0.08}_{-0.05} \text{~(theo)}$. The fiducial cross section is measured to be $\hat{\sigma}_{fid} = 69^{+18}_{-22}~\text{fb} = 69^{+16}_{-22} (\text{stat})^{+8}_{-6} (\text{syst})~\text{fb}$, where the standard model theoretical prediction is $73.8 \pm 3.8~\mathrm{fb}$.