Search for new physics in the final state with a single photon and large missing transverse momentum in proton-proton collisions at; <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline">; <mml:msqrt>; <mml:mi>s</mml:mi>; </mml:msqrt>; <mml:mo>=</mml:mo>; <mml:mn>13</mml:mn>; <mml:mtext> </mml:mtext>; <mml:mtext> </mml:mtext>; <mml:mi>TeV</mml:mi>; </mml:math> | CU Experts

; 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.;

Hayrapetyan A; Makarenko V; Tumasyan A; Adam W; Andrejkovic JW; Benato L; Bergauer T; Dragicevic M; Giordano C; Hussain PS

VIVO