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T.Purwar, H.Rados, P.Raeuber, G.Raiz, S.Reif, M.Reiter, S.Remnev, M.Ripp-Baudot, I.Rizzo, G.Robertson, S. H.Roehrken, M.Roney, J. M.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sandilya, S.Sangal, A.Santelj, L.Sato, Y.Savinov, V.Scavino, B.Schmitt, C.Schwanda, C.Schwartz, A. J.Seino, Y.Selce, A.Senyo, K.Serrano, J.Sevior, M. E.Sfienti, C.Shan, W.Sharma, C.Shen, C. P.Shi, X. D.Shillington, T.Shiu, J. -G.Shtol, D.Sibidanov, A.Simon, F.Singh, J. B.Skorupa, J.Sobie, R. J.Sobotzik, M.Soffer, A.Sokolov, A.Solovieva, E.Spataro, S.Spruck, B.Starič, M.Stavroulakis, P.Stefkova, S.Stottler, Z. S.Stroili, R.Strube, J.Sue, Y.Sumihama, M.Sumisawa, K.Sutcliffe, W.Svidras, H.Takahashi, M.Takizawa, M.Tamponi, U.Tanida, K.Taniguchi, N.Tenchini, F.Thaller, A.Tittel, O.Tiwary, R.Tonelli, D.Torassa, E.Toutounji, N.Trabelsi, K.Tsaklidis, I.Uchida, M.Ueda, I.Uematsu, Y.Uglov, T.Unger, K.Unno, Y.Uno, K.Uno, S.Urquijo, P.Ushiroda, Y.Vahsen, S. E.van Tonder, R.Varner, G. S.Varvell, K. E.Veronesi, M.Vinokurova, A.Vismaya, V. S.Vitale, L.Vobbilisetti, V.Volpe, R.Wach, B.Waheed, E.Wakai, M.Wakeling, H. M.Wallner, S.Wang, E.Wang, M. -Z.Wang, Z.Warburton, A.Watanabe, M.Watanuki, S.Welsch, M.Wessel, C.Won, E.Xu, X. P.Yabsley, B. D.Yamada, S.Yan, W.Yang, S. B.Yelton, J.Yin, J. H.Yoshihara, K.Yuan, C. Z.Yusa, Y.Zani, L.Zhilich, V.Zhou, J. S.Zhou, Q. D.Zhou, X. Y.Zhukova, V. I.2023-12-082023-12-082023-112023-11-292470-0010https://hdl.handle.net/10919/117156We determine the Cabibbo-Kobayashi-Maskawa matrix-element magnitude |V_cb| using B⁰ → D^∗+ℓ⁻ν_ℓ decays reconstructed in 189 fb⁻¹ of collision data collected by the Belle II experiment, located at the SuperKEKB e⁺ e⁻ collider. Partial decay rates are reported as functions of the recoil parameter w and three decay angles separately for electron and muon final states. We obtain |V_cb| using the Boyd-Grinstein-Lebed and Caprini-Lellouch-Neubert parametrizations, and find |V_cb|_BGL = (40.57±0.31±0.95±0.58)×10⁻³ and |V_cb|_CLN = (40.13±0.27±0.93±0.58)× ⁻³ with the uncertainties denoting statistical components, systematic components, and components from the lattice QCD input, respectively. The branching fraction is measured to be β(B⁰ → D^∗+ ℓ⁻ ν_ℓ) = (4.922 ± 0.023 ± 0.220)%. The ratio of branching fractions for electron and muon final states is found to be 0.998 ± 0.009 ± 0.020. In addition, we determine the forward-backward angular asymmetry and the D^∗+ longitudinal polarization fractions. All results are compatible with lepton-flavor universality in the Standard Model.enIn Copyright5107 Particle and High Energy Physics4902 Mathematical Physics49 Mathematical Sciences51 Physical Sciences5101 Astronomical SciencesArticle - Refereedhttps://doi.org/10.1103/physrevd.108.0920131089Piilonen, Leo [0000-0001-6836-0748]2470-0029