000003326 001__ 3326
000003326 005__ 20221115003202.0
000003326 037__ $$aBELLE2-CONF-PROC-2022-020
000003326 041__ $$aeng
000003326 100__ $$aSeema Choudhury
000003326 245__ $$aLepton flavor universality at Belle and Belle II
000003326 260__ $$a$$c2022-11-12
000003326 300__ $$a8
000003326 520__ $$aWe report the test of lepton flavor universality at Belle and Belle II experiments considering b -> c and b -> s transitions. We use 711/fb and 189/fb of data collected at Y(4S ) resonance from electron-positron collisions for Belle and Belle II, respectively. For the b -> c transition, we present the measurement of lepton-flavor-universality in B0 -> D*- l+nu  decay, exclusive measurement of R(D) & R(D*) in Belle data, and inclusive R(Xe/mu) in Belle II. For the b -> s transitions, we provide measurements of R(K) and R(K*) using Belle data, measurement of the branching fraction for the decay B->K*ll, and test of lepton-flavor-universality in B->J/psiK using Belle II data. Additionally, we report the lepton-flavor-universality in Omega0_c -> omega-l+nu decay using 922/fb of data collected by the Belle detector.
000003326 6531_ $$aLFU, Belle, Belle II
000003326 8560_ $$fseema.choudhury@kek.jp
000003326 8564_ $$uhttps://docs.belle2.org/record/3326/files/BELLE2-CONF-PROC-2022-020.pdf