Waheed E. et al.Urquijo, P.P.UrquijoFerlewicz, D.D.FerlewiczAdachi, I.I.AdachiAdamczyk, K.K.AdamczykAihara, H.H.AiharaAl Said, S.S.Al SaidAsner, D.M.D.M.AsnerAtmacan, H.H.AtmacanAushev, T.T.AushevAyad, R.R.AyadBabu, V.V.BabuBadhrees, I.I.BadhreesBansal, V.V.BansalBehera, P.P.BeheraBeleño, C.C.BeleñoBernlochner, F.F.BernlochnerPAO-TI CHANGWEI-SHU HOU2021-07-282021-07-28201924700010https://www.scopus.com/inward/record.uri?eid=2-s2.0-85072963301&doi=10.1103%2fPhysRevD.100.052007&partnerID=40&md5=277fc2190d74fce3e3236e7bb255fceehttps://scholars.lib.ntu.edu.tw/handle/123456789/574773We present a new measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| from B0→D?-?+ν? decays, reconstructed with the full Belle data set of 711 fb-1 integrated luminosity. Two form factor parametrizations, originally conceived by the Caprini-Lellouch-Neubert (CLN) and the Boyd, Grinstein and Lebed (BGL) groups, are used to extract the product F(1)ηEW|Vcb| and the decay form factors, where F(1) is the normalization factor and ηEW is a small electroweak correction. In the CLN parametrization we find F(1)ηEW|Vcb|=(35.06±0.15±0.56)×10-3, ρ2=1.106±0.031±0.007, R1(1)=1.229±0.028±0.009, R2(1)=0.852±0.021±0.006. For the BGL parametrization we obtain F(1)ηEW|Vcb|=(34.93±0.23±0.59)×10-3, which is consistent with the world average when correcting for F(1)ηEW. The branching fraction of B0→D?-?+ν? is measured to be B(B0→D?-?+ν?)=(4.90±0.02±0.16)%. We also present a new test of lepton flavor universality violation in semileptonic B decays, B(B0→D?-e+ν)B(B0→D?-μ+ν)=1.01±0.01±0.03. The errors quoted correspond to the statistical and systematic uncertainties, respectively. This is the most precise measurement of F(1)ηEW|Vcb| and form factors to date and the first experimental study of the BGL form factor parametrization in an experimental measurement. ? 2019 authors. Published by the American Physical Society.journal article10.1103/PhysRevD.100.0520072-s2.0-85072963301