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Trabelsi, K; Olsen, S L; Adachi, I; Adamczyk, K; Asner, D M; Aulchenko, V; Bakich, A M; Barberio, E; Belous, K; Bhuyan, B; Bischofberger, M; Bondar, A; Brodzicka, J; Chen, A; Chen, P; Cheon, B G; Cho, K; Choi, Y; Dalseno, J; Doležal, Z; Eidelman, S; Gabyshev, N; Golob, B; Horii, Y; Hou, W-S; Hsiung, Y B; Hyun, H J; Iijima, T; Inami, K; Iwabuchi, M; Iwasaki, Y; Iwashita, T; Joshi, N J; Julius, T; Kawasaki, T; Kiesling, C; Kim, H O; Kim, J B; Kim, M J; Kim, S K; Kim, Y J; Ko, B R; Kobayashi, N; Korpar, S; Kumita, T; Kuzmin, A; Kwon, Y-J; Li, Y; Lim, C-L; Liventsev, D; Louvot, R; McOnie, S; Miyabayashi, K; Miyata, H; Mizuk, R; Mohanty, G B; Mussa, R; Nakano, E; Nakao, M; Nakazawa, H; Ng, C; Nishida, S; Nitoh, O; Nozaki, T; Ohshima, T; Pakhlova, G; Park, H K; Pestotnik, R; Piilonen, L E; Sahoo, H; Sakai, Y; Schneider, O; Seon, O; Shapkin, M; Shebalin, V; Shibata, T-A; Shiu, J-G; Shwartz, B; Smerkol, P; Stanič, S; Starič, M; Teramoto, Y; Uchida, M; Uehara, S; Uglov, T; Unno, Y; Uno, S; Usov, Y; Varner, G; Vossen, A; Wang, X L; Watanabe, M; Watanabe, Y; Williams, K M; Yabsley, B D; Yamashita, Y; Yuan, C Z; Zhang, Z P; Zhilich, V; Zhulanov, V
Physical review letters, 2011-Aug-26, 20110826, 2011-08-26, Letnik: 107, Številka: 9Journal Article
We report a study of B→(J/ψγ)K and B→(ψ'γ)K decay modes using 772×10⁶ B ̅B events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We observe X(3872)→J/ψγ and report the first evidence for χ(c2)→J/ψγ in B→(X_{c ̅cγ)K decays, while in a search for X(3872)→ψ'γ no significant signal is found. We measure the branching fractions, B(B(±)→X(3872)K(±))B(X(3872)→J/ψγ)=(1.78(-0.44)(+0.48)±0.12)×10(-6), B(B(±)→χ(c2)K(±))=(1.11(-0.34)(+0.36)±0.09)×10(-5), B(B(±)→X(3872)K(±))B(X(3872)→ψ'γ)<3.45×10⁶ (upper limit at 90% C.L.), and also provide upper limits for other searches.
