August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【325】Measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| using the decay B− -> D0 l− nu_l at Belle II

Sep 1, 2021, 3:30 PM
15m
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics

Speaker

Philipp Horak (Austrian Academy of Sciences (AT))

Description

A long-standing discrepancy in flavour physics is observed in the determination of the CKM elements |Vcb| and |Vub|. For |Vcb|, a combined tension of about 3σ is seen between different methods of determination. We revisit the decay B- -> D0 l- nu_l using data of the Belle II experiment to clarify the experimental status of this parameter. In addition to a measurement of the decay branching fraction and a test of lepton universality between electron and muon channels, the rate as a function of the 4-momentum squared of the lepton-neutrino q^2 is determined to fit for the CKM element |Vcb|. The preliminary results will be presented.

Primary author

Philipp Horak (Austrian Academy of Sciences (AT))

Presentation materials