Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 123: Flavour physics 5

T 123.3: Talk

Friday, March 8, 2024, 09:30–09:45, Geb. 30.41: HS 2

Angular analysis of B⁰ → D^∗µ ν decay at LHCb — •Biljana Mitreska¹, Johannes Albrecht¹, Lucia Grillo², Gregory Ciezarek³, Marco Gersabeck⁴, Derek Yeung⁴, Hasret Nur², Tobias Knospe¹, and Manuel Schiller² — ¹TU Dortmund University, Dortmund, Germany — ²University of Glasgow, Glasgow, UK — ³CERN, Geneva, Switzerland — ⁴The University of Manchester, Manchester, UK

Semileptonic b → c ℓ ν decays are excellent probe for testing Lepton Flavour Universality and New Physics (NP) effects. A search for NP is performed with an angular analysis of B⁰ → D^∗ µ ν decays in pp collision data collected by LHCb with an integrated luminosity of 3 fb⁻¹. The signal is extracted using a multidimensional fit to data using templated distributions derived from simulation and from control samples in collision data. New Physics contributions are measured via their corresponding Wilson coefficients and in several fit configurations that allow for different New Physics operators. Form factor parameters using three parametrizations (BLPR, CLN and BGL) are measured in a Standard Model scenario.

Keywords: Semileptonic decays; LHCb