Search for narrow H-gamma resonances in proton-proton collisions at sqrt(s) = 13 TeV

A search for heavy, narrow-width resonances decaying to a Higgs boson and a photon has been performed in proton-proton collision data corresponding to an integrated luminosity of 35.9 inverse femtobarns, collected with the CMS detector at the LHC at a center-of-mass energy of 13 TeV in 2016. Events in which a photon and a Lorentz-boosted Higgs boson that decays hadronically and reconstructed as a single, large-radius jet are considered, and the photon+jet invariant mass spectrum is analyzed to look for the presence of narrow-width resonances. To increase the sensitivity of the search, events are categorized depending on whether the large-radius jet is consistent with originating from merging of two b quarks. Results in both categories are found to agree with the predictions of the standard model. Upper limits on the production of Higgs+photon resonances are set as a function of resonance mass in the range of $720\mathrm{-}3250~\mathrm{GeV}$, representing the most stringent limits to date.