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T: Fachverband Teilchenphysik

T 41: Trigger+DAQ 1

T 41.8: Talk

Tuesday, March 5, 2024, 17:45–18:00, Geb. 30.23: 3/1

Dilepton selections for the LHCb experiment Run 3 trigger — Johannes Albrecht, •James Andrew Gooding, and Biljana Mitreska — TU Dortmund University, Dortmund, Germany

A central focus of the LHCb experiment is the measurement of B meson decays with multiple leptons in the final state. Multi-lepton B decays provide access to many tests of the Standard Model, e.g., tests of lepton-flavour universality. Measurements of such decays rely on high-quality lepton selection, particularly the selection of dilepton events, i.e., events containing a lepton pair, typically performed through cuts on kinematic and topological variables.

During the Run 3 data-taking period of the LHC, the LHCb experiment will process collisions at 30 MHz, employing a software-based trigger system to select only physics-relevant events in real time. Within this framework, an inclusive cut-based trigger has been developed to select dilepton events, complementing existing selection strategies. This contribution presents the status of the inclusive cut-based dilepton trigger, placing particular emphasis on trigger development and commissioning.

Keywords: LHCb; Trigger; Real-time; Dilepton; Selection