Göttingen 2025 – scientific programme

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T: Fachverband Teilchenphysik

T 1: Searches/BSM I (HNL, ETmiss+X)

T 1.7: Talk

Monday, March 31, 2025, 18:15–18:30, ZHG010

Search for new physics in the final state with a tau lepton and missing transverse momentum. — •Valentina Sarkisovi, Kerstin Hoepfner, Alexander Schmidt, and Thomas Hebbeker — III. Physikalisches Institut A

Various Beyond the Standard Model (BSM) theories anticipate the existence of new particles that could decay into final states characterized by the presence of a charged lepton and missing transverse momentum (pT_miss) as their most distinctive experimental signature. The CMS detector at the CERN LHC is used to hunt for novel physics in the high mass region of final states containing a tau lepton and pT_miss. Efficient identification and reconstruction of TeV tau leptons, good description of the high mass region and effective search for the wide range of BSM models are crucial in a tau + pT_miss search for such phenomena. CMS data recorded in 2022 and 2023 in pp collisions with the center-of-mass energy of 13.6 TeV have been analysed. This talk addresses the key concepts of the analysis techniques employed in the search for new physics in the final state with a tau lepton and pT_miss, including various theoretical interpretations. Models with enhanced coupling to third generation leptons are of special interest.

Keywords: BSM; Searches; Tau