First results on Higgs to gammagamma at 13 TeV

The measurement of the Higgs boson production for the two photon decay channel with the first LHC $\textrm{Run}~2$ data is described. The analysis is performed using the dataset recorded by the CMS experiment at the LHC from pp collisions at centre-of-mass energy of $13~\textrm{TeV}$ corresponding to an integrated luminosity of $2.7~\textrm{fb}^{-1}$. An event classification has been performed to maximize signal significance and to study specific Higgs boson production modes. The observed significance for the standard model (SM) Higgs boson is $1.7~\sigma$, where a significance of $2.7~\sigma$ is expected. The best-fit signal strength relative to the standard model prediction is $0.69^{+0.47}_{-0.42}$. Additional measurements include the signal strength associated with different production mechanisms.