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  • Bhardwaj, V; Miyabayashi, K; Adachi, I; Aziz, T; Bakich, A M; Bischofberger, M; Browder, T E; Chen, A; Cheon, B G; Chilikin, K; Chistov, R; Cinabro, D; Doležal, Z; Drásal, Z; Dutta, D; Dutta, K; Eidelman, S; Epifanov, D; Ferber, T; Gaur, V; Gabyshev, N; Gillard, R; Goh, Y M; Hara, T; Horii, Y; Hoshi, Y; Hou, W-S; Hsiung, Y B; Iijima, T; Inami, K; Ishikawa, A; Julius, T; Kah, D H; Kato, E; Kim, J H; Kim, K T; Kim, M J; Kim, Y J; Kinoshita, K; Klucar, J; Ko, B R; Kodyš, P; Korpar, S; Križan, P; Kumita, T; Kuzmin, A; Kwon, Y-J; Lee, S-H; Li, Y; Liventsev, D; Miyata, H; Mizuk, R; Moll, A; Mussa, R; Nakano, E; Nayak, M; Nisar, N K; Nishida, S; Olsen, S L; Park, H K; Ritter, M; Rostomyan, A; Sakai, K; Sakai, Y; Sandilya, S; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schwanda, C; Semmler, D; Seon, O; Sevior, M E; Shapkin, M; Shiu, J-G; Smerkol, P; Sokolov, A; Solovieva, E; Steder, M; Sumiyoshi, T; Tanida, K; Tatishvili, G; Teramoto, Y; Tsuboyama, T; Uglov, T; Urquijo, P; Vahsen, S E; Van Hulse, C; Vanhoefer, P; Varvell, K E; Wang, C H; Wang, M-Z; Wang, P; Watanabe, M; Watanabe, Y; Yabsley, B D; Yamashita, Y; Yuan, C Z; Zhang, Z P; Zupanc, A

    Physical review letters, 2013-Jul-19, Letnik: 111, Številka: 3
    Journal Article

    We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BBover ¯ events collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. Evidence of a new resonance in the χ(c1)γ final state is found with a statistical significance of 3.8σ. This state has a mass of 3823.1±1.8(stat)±0.7(syst) MeV/c(2), a value that is consistent with theoretical expectations for the previously unseen 1(3)D(2) ccover ¯ meson. We find no other narrow resonance and set upper limits on the branching fractions of the X(3872)→χ(c1)γ and χ(c2)γ decays.