SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 4: Searches I

T 4.1: Vortrag

Montag, 20. März 2023, 16:30–16:45, HSZ/0403

Search for long-lived particles decaying into displaced jets using a trackless and delayed jet tagger — •Lisa Benato and Gregor Kasieczka — Institute of Experimental Physics, Hamburg University

A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. A novel technique, using trackless and delayed jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of ∼1 m, for which neutralino masses from up to 1180 GeV are excluded at 95% confidence level.