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Wehle, S; Adachi, I; Babu, V; Behera, P; Bozek, A; Bračko, M; Campajola, M; Chang, M-C; Cheon, B G; Chilikin, K; Cho, K; Choi, Y; Choudhury, S; Cinabro, D; Dash, N; De Nardo, G; Dubey, S; Eidelman, S; Garg, R; Gaur, V; Giri, A; Goldenzweig, P; Greenwald, D; Haba, J; Hayashii, H; Hedges, M T; Higuchi, T; Hou, W-S; Inami, K; Iwasaki, Y; Jia, S; Jin, Y; Joffe, D; Kaliyar, A B; Karyan, G; Kim, D Y; Kim, S H; Kim, Y-K; Kinoshita, K; Korpar, S; Kroeger, R; Kulasiri, R; Lange, J S; Lee, J Y; Li, Y B; Libby, J; Liptak, Z; Liventsev, D; Luo, T; MacNaughton, J; Masuda, M; Matsuda, T; Merola, M; Miyata, H; Mizuk, R; Moon, T J; Natochii, A; Nayak, M; Niebuhr, C; Nisar, N K; Ogawa, K; Ogawa, S; Onuki, Y; Pakhlov, P; Pakhlova, G; Park, H; Park, S-H; Pestotnik, R; Piilonen, L E; Popov, V; Prencipe, E; Prim, M T; Sakai, Y; Sangal, A; Savinov, V; Senyo, K; Sevior, M E; Shiu, J-G; Shwartz, B; Starič, M; Sutcliffe, W; Tamponi, U; Tao, Y; Trabelsi, K; Uglov, T; Unno, Y; Uno, S; Vahsen, S E; Van Tonder, R; Varvell, K E; Vorobyev, V; Wang, C H; Wang, M-Z; Wang, P; Wang, X L; Xu, X; Yang, S B; Zhang, Z P; Zhilich, V; Zhukova, V
Physical review letters, 2021-Apr-23, Letnik: 126, Številka: 16Journal Article
We present a measurement of R_{K^{*}}, the branching fraction ratio B(B→K^{*}μ^{+}μ^{-})/B(B→K^{*}e^{+}e^{-}), for both charged and neutral B mesons. The ratio for the charged case R_{K^{*+}} is the first measurement ever performed. In addition, we report absolute branching fractions for the individual modes in bins of the squared dilepton invariant mass q^{2}. The analysis is based on a data sample of 711 fb^{-1}, containing 772×10^{6} BBover ¯ events, recorded at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider. The obtained results are consistent with standard model expectations.
