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T: Fachverband Teilchenphysik

T 84: Flavour Physics

T 84.7: Vortrag

Donnerstag, 24. März 2022, 17:45–18:00, T-H15

Untagged B⁰ → D^*+ ℓ⁻ ν_ℓ studies with Belle II — Florian Bernlochner¹, Lu Cao^{1, 2}, Jochen Dingfelder¹, and •Chaoyi Lyu¹ — ¹Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn — ²Deutsches Elektronen-Synchrotron DESY

The precise determination of the CKM matrix element |V_cb| and semileptonic form factors in B meson decays are important for carrying out precision tests of the flavour sector of the Standard Model and to search for new physics. The decay of B⁰ → D^*+ ℓ⁻ ν_ℓ is particularly well suited to determine |V_cb| due to its large branching fraction, small backgrounds and the availability of lattice data to describe the form factors. In this talk, we will present the current status of establishing an untagged measurement of the B⁰ → D^*+ ℓ⁻ ν_ℓ branching fraction and form factors using early Belle II data.