Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 52: Search for new particles 4 (leptoquarks, LHC)

T 52.8: Talk

Wednesday, March 6, 2024, 17:45–18:00, Geb. 20.30: 1.067

Search for new physics in the top, charm and missing transverse energy final state with the ATLAS detector — •Marawan Barakat — DESY

A search for new Beyond the Standard Model(BSM) particles in final states with a top quark, charm quark and missing transverse momentum is performed, using a dataset collected with the ATLAS detector during LHC Run 2, corresponding to an integrated luminosity of 139 fb-1 at a centre-of-mass energy 13 TeV. The search is motivated by BSM theoretical models featuring an non-minimal flavor violation in the 2nd and 3rd generation quark sector, giving rise to final states where BSM particles can decay almost equally to a top quark or a charm quark in association with invisible particles. Good agreement is generally found between data and SM background, with slight deviations of atmost 2 sigmas. Exclusion limits are presented for different BSM signal scenarios.

Keywords: SUSY; Dark matter