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T: Fachverband Teilchenphysik
T 18: Flavor physics: algorithms
T 18.2: Vortrag
Montag, 30. März 2020, 16:45–17:00, L-3.001
HAMMER: a tool for new physics searches in semileptonic decays at Belle II and LHCb — Florian Bernlochner1, Jochen Dingfelder1, •Stephan Duell1, Zoltan Ligeti2, Michele Papucci2, and Dean Robinson2 — 1Rheinische Friedrich-Wilhelms-Universität Bonn — 2Lawrence Berkeley National Laboratory
The search for new physics involving semileptonic b-hadron decays requires large, dedicated Monte Carlo data sets, in order to accurately model acceptance and selection efficiencies. We present the HAMMER reweighting tool, developed for and in conjunction with the LHCb and Belle II experiments, that makes use of an efficient event and histogram reweighting strategy, permitting computationally inexpensive exploration of new physics effects in the fully differential phase space. The HAMMER approach also permits to study the effects of different choices for hadronic form-factor parametrizations describing the semileptonic b-hadron decays, which are crucial for the measurement of the CKM elements |Vcb| and |Vub|. In this talk we present various example applications of this tool, both for new physics and CKM matrix studies, and summarize the features of the released version 1.0.