Krohn, J. -F.Ferlewicz, D.Urquijo, P.Adachi, I.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aushev, T.Ayad, R.Babu, V.Bahinipati, S.Behera, P.Belous, K.Bessner, M.Bhardwaj, V.Bhuyan, B.Bilka, T.Bodrov, D.Bonvicini, G.Borah, J.Bozek, A.Bracko, M.Branchini, P.Browder, T. E.Budano, A.Campajola, M.Cervenkov, D.Chang, M. -C.Chang, P.Chekelian, V.Chen, A.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Cho, S. -J.Choi, Y.Choudhury, S.Cinabro, D.Cunliffe, S.Das, S.Dash, N.De Nardo, G.De Pietro, G.Dhamija, R.Di Capua, F.Dolezal, Z.Dong, T. V.Epifanov, D.Ferber, T.Fulsom, B. G.Garg, R.Gaur, V.Gabyshev, N.Goldenzweig, P.Golob, B.Graziani, E.Gu, T.Gudkova, K.Hadjivasiliou, C.Hara, T.Hayasaka, K.Hayashii, H.Hou, W. -S.Hsu, C. -L.Inami, K.Ishikawa, A.Iwasaki, M.Iwasaki, Y.Jacobs, W. W.Jang, E. -J.Jia, S.Jin, Y.Joo, K. K.Kahn, J.Kaliyar, A. B.Kang, K. H.Kawasaki, T.Kichimi, H.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, Y. -K.Kinoshita, K.Kodys, P.Konno, T.Korobov, A.Korpar, S.Kovalenko, E.Krizan, P.Krokovny, P.Kumar, M.Kumar, R.Kumara, K.Kwon, Y. -J.Lam, T.Laurenza, M.Lee, S. C.Li, J.Li, L. K.Li, Y. B.Gioi, L. LiLibby, J.Liventsev, D.Martini, A.Masuda, M.Matsuda, T.Matvienko, D.Maurya, S. K.Meier, F.Merola, M.Metzner, F.Miyabayashi, K.Mizuk, R.Mohanty, G. B.Mussa, R.Nakao, M.Narwal, D.Natkaniec, Z.Natochii, A.Nayak, L.Nisar, N. K.Nishida, S.Nishimura, K.Ogawa, K.Ogawa, S.Ono, H.Oskin, P.Pakhlov, P.Pakhlova, G.Pang, T.Pardi, S.Park, S. -H.Patra, S.Pedlar, T. K.Pestotnik, R.Piilonen, Leo E.Podobnik, T.Popov, V.Prim, M. T.Rohrken, M.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sandilya, S.Sangal, A.Santelj, L.Sanuki, T.Savinov, V.Schnell, G.Schueler, J.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shapkin, M.Sharma, C.Shebalin, V.Shen, C. P.Shiu, J. -G.Shwartz, B.Simon, F.Solovieva, E.Stanic, S.Staric, M.Stottler, Z. S.Sumihama, M.Sumisawa, K.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tamponi, U.Tanida, K.Tenchini, F.Trabelsi, K.Uchida, M.Unno, Y.Uno, K.Uno, S.Vahsen, S. E.van Tonder, R.Varner, G.Varvell, K. E.Vinokurova, A.Waheed, E.Wang, E.Wang, M. -Z.Wang, X. L.Watanuki, S.Won, E.Yan, W.Ye, H.Yelton, J.Yin, J. H.Yusa, Y.Zhai, Y.Zhilich, V.Zhukova, V.2024-01-222024-01-222023-01-242470-0010https://hdl.handle.net/10919/117462Using (771.6±10.6)×106 BB¯ meson pairs recorded by the Belle experiment at the KEKB e+e- collider, we report the branching fractions B(B¯0→D∗+π-)=(2.62±0.02±0.09)×10-3 and B(B¯0→D∗+K-)=(2.22±0.06±0.08)×10-4; the quoted uncertainties are statistical and systematic, respectively. A measurement of the ratio of these branching fractions is also presented, RK/π=B(B¯→D∗+K-)/B(B¯→D∗+π-)=(8.41±0.24±0.13)×10-2, where systematic uncertainties due to the D∗+ meson reconstruction cancel out. Furthermore, we report a new QCD factorization test based on the measured ratios for B¯→D∗+h- and B¯→D∗+ℓ-ν decays at squared momentum transfer values equivalent to the mass of the h=π or K hadron. The parameters |a1(h)| are measured to be |a1(π)|=0.884±0.004±0.003±0.016 and |a1(K)|=0.913±0.019±0.008±0.013, where the last uncertainties account for all external inputs. These values are approximately 15% lower than those expected from theoretical predictions. Subsequently, flavor SU(3) symmetry is tested by measuring the ratios for pions and kaons, |a1(K)|2/|a1(π)|2=1.066±0.042±0.018±0.023, as well as for different particle species. The ratio is consistent with unity and therefore no evidence for SU(3) symmetry breaking effects is found at the 5% precision level.12 page(s)application/pdfenIn CopyrightArticle - Refereedhttps://doi.org/10.1103/PhysRevD.107.0120031071Piilonen, Leo [0000-0001-6836-0748]2470-0029