Dortmund 2021 – wissenschaftliches Programm
T 81.10: Vortrag
Donnerstag, 18. März 2021, 18:15–18:30, Tf
Untagged B0 → D*+ ℓ− νℓ studies with Belle II — Florian Bernlochner, Lu Cao, Jochen Dingfelder, and •Chaoyi Lyu for the Belle II collaboration — Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
The precise determination of the CKM matrix element |Vcb| 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− νℓ is particularly well suited to determine |Vcb| due to its large branching fraction, small backgrounds and the availability of lattice data to describe the form factors. In this talk, I will present the current status of establishing an untagged measurement of the B0 → D*+ ℓ−νℓ branching fraction and form factors using early Belle II data. In addition, I will report on the status of the determination of the slow pion reconstruction efficiency using fully hadronic B-meson decays.