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T: Fachverband Teilchenphysik

T 9: Search for Supersymmetry

T 9.1: Talk

Monday, March 21, 2022, 16:15–16:30, T-H22

Search for Higgsino production in SUSY scenarios with a compressed mass spectrum — •Yuval Nissan, Sam Bein, Peter Schleper, and Gudrid Moortgat-Pick — Universität Hamburg

A search for leptonic decays of Higgsino-like neutralinos in the case of a compressed mass spectrum using two soft lepton tracks and missing transverse momentum is presented. We consider the case of a second-lightest neutralino decaying into a dark matter candidate - lightest neutralino - and two leptons via an off-shell Z boson. In the case of a small mass differences between the neutralinos, the leptons produced are very soft, making them difficult to reconstruct at CMS. Signals of different mass splitting are probed and interpreted within a set of simplified models. Multivariate discriminants are employed in the event and object-level selection, and their performance is studied.