Measurements of |Vcb| and |Vub| from Belle and Belle~II

Sumitted to PubDB: 2023-11-01

Category: Proceeding, Visibility: Public

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Authors Lu Cao
Date 2023-11-01
Belle II Number BELLE2-CONF-PROC-2023-042
Abstract This proceeding summarizes recent measurements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |Vcb| and |Vub| at the Belle and Belle~II experiments. It provides insights derived from both exclusive and inclusive determinations. Preliminary results from Belle~II are discussed, focusing on B0D+ν and B0π+ν utilizing 189fb1 data collected at the Υ(4S) resonance. This reveals the derived branching fractions and |Vxb|. The shape measurement of BDν at Belle extracted |Vcb| employing new lattice-QCD calculations as input and provided additional tests on the universality of light lepton flavors. In the realm of inclusive decay, the measurement for |Vub| and the differential spectra of BXuν decays have been performed. This presentation also encapsulates the new analyses of |Vub|excl/|Vub|incl and |Vub|incl/|Vcb|incl ratios.

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