000003747 001__ 3747
000003747 005__ 20230719083207.0
000003747 037__ $$aBELLE2-TALK-CONF-2023-098
000003747 041__ $$aeng
000003747 088__ $$aBELLE2-TALK-DRAFT-2023-102
000003747 088__ $$aBELLE2-TALK-DRAFT-2023-107
000003747 100__ $$aYoungjoon Kwon
000003747 245__ $$aSemileptonic B decays at Belle II and Belle
000003747 260__ $$aThe 30th International Conference on Supersymmetry and Unification of Fundamental Interactions (SUSY 2023)$$c2023-07-18
000003747 300__ $$a39
000003747 500__ $$a20 minutes including discussions
000003747 520__ $$aPrecise determination of the magnitudes and phases of the elements, in particular, Vcb and Vub, of the Cabibbo-Kobayashi-Maskawa (CKM) matrix is crucial for testing the unitarity of the CKM matrix, hence testing the Standard Model. The magnitudes of these elements are best measured by using B-meson semileptonic decays. Moreover, semileptonic B-meson decays provide a great testing ground for lepton universality of charged-current weak interaction processes. We reported recent unique and/or competitive results of inclusive and exclusive B-meson semileptonic decays, which have been measured by analyzing high-statistics data sample of BB pairs from the Belle and Belle II experiments. Some of these analyses utilize tag-side reconstruction of a companion B-meson decaying into hadronic final states, providing direct access to the signal rest-frame and the relevant decay characteristics. The subjects we present in this talk are all relevant for either testing lepton universality or precision measurement of the CKM elements Vcb and Vub.
000003747 6531_ $$aSemileptonic B
000003747 6531_ $$aBelle II
000003747 6531_ $$aBelle 
000003747 6531_ $$aVub
000003747 6531_ $$aLepton Flavor Universality 
000003747 8560_ $$fyjkwon63@yonsei.ac.kr
000003747 8564_ $$uhttps://docs.belle2.org/record/3747/files/BELLE2-TALK-CONF-2023-098.pdf