Searches for physics beyond the Standard Model at Belle II

Swagato Banerjee, University of Louisville

Abstract

The group’s institutional responsibilities include managing online operations, data-quality monitoring, and evaluating performance benchmarks of the KLong and Muon (KLM) detector. The group leads the Physics Modeling / Monte Carlo Event Generators effort as the primary developer and maintainer of the TauolaBelle2 generator, manages centralized event sample production for tau analysts in the Data Production group, and provides technical expertise for authorship management for the Belle II Publication Committee.

The group’s current physics interests focus on searches for lepton flavor violation using charm-pair events, as well as searches for physics beyond the Standard Model using radiative tau-pair decays at Belle II. Analysts at Louisville recently completed searches for lepton-flavor-violating decays of scalar, axial-vector, and tensor quarkonium states consisting of beauty quark pairs produced in electron–positron collisions at the center-of-mass energy of the Υ(2S) resonance.

The PI led searches for charged lepton flavor violation in the tau sector for the Snowmass Planning Exercise to help identify community priorities for the next decade, as well as highlighting the physics potential of tau leptons at the Belle II experiment. The PI also co-convenes activities for the tau subgroup of the Heavy Flavor Averaging Group (HFLAV) and is co-authoring the tau branching-fraction article for theReview of Particle Physicson behalf of the Particle Data Group.