Evidence of a new narrow resonance decaying to χ(c1)γ in B→χ(c1)γK

We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] 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. T...

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Veröffentlicht in:	Physical review letters 2013-07, Vol.111 (3), p.032001-032001
Hauptverfasser:	Bhardwaj, V, Miyabayashi, K, Adachi, I, Aihara, H, Asner, D M, Aulchenko, V, Aushev, T, Aziz, T, Bakich, A M, Bala, A, Bhuyan, B, Bischofberger, M, Bondar, A, Bonvicini, G, Bozek, A, Bračko, M, Brodzicka, J, Browder, T E, Chekelian, V, Chen, A, Cheon, B G, Chilikin, K, Chistov, R, Cho, K, Chobanova, V, Choi, S-K, Choi, Y, Cinabro, D, Dalseno, J, Danilov, M, Doležal, Z, Drásal, Z, Drutskoy, A, Dutta, D, Dutta, K, Eidelman, S, Epifanov, D, Farhat, H, Fast, J E, Ferber, T, Frey, A, Gaur, V, Gabyshev, N, Ganguly, S, Gillard, R, Goh, Y M, Golob, B, Haba, J, Hara, T, Hayashii, H, Horii, Y, Hoshi, Y, Hou, W-S, Hsiung, Y B, Hyun, H J, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwashita, T, Julius, T, Kah, D H, Kang, J H, Kato, E, Kawasaki, T, Kichimi, H, Kiesling, C, Kim, D Y, Kim, J B, 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, Krokovny, P, Kumar, R, Kumita, T, Kuzmin, A, Kwon, Y-J, Lange, J S, Lee, S-H, Li, J, Li, Y, Liu, C, Liu, Z Q, Liventsev, D, Lukin, P, Matvienko, D, Miyata, H, Mizuk, R, Mohanty, G B, Moll, A, Mussa, R, Nakano, E, Nakao, M
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Sprache:	eng
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Zusammenfassung:	We report measurements of B→χ(c1)γK and χ(c2)γK decays using 772×10(6) BB[over ¯] 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) cc[over ¯] 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.
ISSN:	1079-7114
DOI:	10.1103/PhysRevLett.111.032001