CMS-PAS-SUS-23-016

CMS-PAS-SUS-23-016
Search for new physics in the final state of a single photon and large missing transverse energy in proton-proton collisions at $ \sqrt{s}= $ 13 TeV
CMS Collaboration
28 March 2025

Abstract: A search for new physics in the final state of a single photon and high missing transverse energy is performed using proton-proton collision data at a center-of-mass energy of $ \sqrt{s}= $ 13 TeV. The analysis is performed on a data sample corresponding to an integrated luminosity of 101.3 fb$ ^{-1} $, collected using the CMS detector in 2017 and 2018. A statistical combination is performed with an earlier search based on 35.9 fb$ ^{-1} $, collected in 2016. 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 the 95% confidence level. For the two simplified dark matter production models considered, the observed (expected) lower limits on the mediator masses are both 1085 (1300) GeV for 1 GeV dark matter mass. For an effective electroweak-dark matter contact interaction, the observed (expected) lower limit on the suppression parameter $ \Lambda $ is 937 (1000) GeV. For the ADD model, which provides the framework for extra dimensions aspects, values of the effective Planck scale up to 3.17-3.20 TeV are excluded between 3 and 6 extra spatial dimensions.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to PRD. The superseded preliminary plots can be found here.

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