Search for new physics in final states with a single photon and missing transverse momentum in proton-proton collisions at √s = 13 TeV

Abstract

A search is conducted for new physics in nal states containing a photon and missing transverse momentum in proton-proton collisions at p s = 13TeV, using the data collected in 2016 by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35:9 fbð€€€1. No deviations from the predictions of the standard model are observed. The results are interpreted in the context of dark matter production and models containing extra spatial dimensions, and limits on new physics parameters are calculated at 95% con dence level. For the two simpli ed dark matter production models considered, the observed (expected) lower limits on the mediator masses are both 950 (1150) GeV for 1 GeV dark matter mass. For an e ective electroweak-dark matter contact interaction, the observed (expected) lower limit on the suppression parameter is 850 (950) GeV. Values of the e ective Planck scale up to 2.85{2.90TeV are excluded for between 3 and 6 extra spatial dimensions.