Search for resonant production of high mass photon pairs using $12.9\,\mathrm{fb^{-1}}$ of proton-proton collisions at $\sqrt{s} = 13~\mathrm{TeV}$ and combined interpretation of searches at 8 and 13 TeV

We report on a search for resonant production of high mass photon pairs. The search employs $12.9\,\mathrm{fb^{-1}}$ of pp collision data collected by the CMS experiment in 2016 at a centre-of-mass energy of $13\,\mathrm{TeV}$. It is aimed at spin-0 and spin-2 resonances of mass between $0.5$ and $4.5\,\mathrm{TeV}$ and width, relative to the mass, up to $5.6\times10^{-2}$. The results of the search are combined statistically with those previously obtained by the CMS collaboration at $\sqrt{s}=8$ and $13\,\mathrm{TeV}$. Limits are set on scalar resonances produced through gluon-gluon fusion, and on Randall--Sundrum gravitons. No significant excess is observed over the standard model predictions.