Search for new physics in the final state with a single photon and large missing transverse momentum in proton-proton collisions at √(s) = 13 TeV

2025/11/21 by CMS Collaboration · 2 voices
#hep-ex

paper · pdf · doi:10.48550/arxiv.2511.17310

Abstract

A search for new physics in events featuring a single photon and missing transverse momentum is presented, using proton-proton √(s) = 13 TeV collision data corresponding to an integrated luminosity of 101 fb^-1 collected by the CMS experiment at the CERN LHC between 2017 and 2018. This analysis, combined with a previous study of 36 fb^-1 of 2016 data (totaling 137 fb^-1), reveals no significant deviations from standard model expectations. The results are then used to establish 95% confidence level limits on parameters in theoretical models involving dark matter and large extra dimensions. Compared to the 2016-only analysis, this search achieves up to a 14% improvement in exclusion reach for mediator masses in simplified dark matter models, along with 11% and 10% enhancements in the limits on the effective field theory suppression scale and the fundamental Planck scale, respectively. These results are the most stringent constraints on these parameters to date.

Citations

• Dark Matter Search Results from 4.2 Tonne-Years of Exposure of the LUX-ZEPLIN (LZ) Experiment
• Recommendations on presenting LHC searches for missing transverse energy signals using simplified s-channel models of dark matter
• Search for neutrinos from annihilation of captured low-mass dark matter particles in the Sun by Super-Kamiokande

Discussions

• Gravitons exist in all sorts of grand unification physics theories. This #CMSPaper looks for them in the photon+missing energy signature, which is also a good signature to check for #darkmatter by the [bsky, 5 points, 0 comments]
• #CMSpaper: Search for new physics in the final state with a single photon and large missing transverse momentum in proton-proton collisions at √s = 13 TeV (arXiv:2511.17310) https://arxiv.org/abs/2511 [bsky, 2 points, 0 comments]

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