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Observation of X (3872) in B →x (3872)Kπ decays
Date Issued
02-03-2015
Author(s)
Bala, A.
Bhardwaj, V.
Trabelsi, K.
Singh, J. B.
Abdesselam, A.
Adachi, I.
Aihara, H.
Arinstein, K.
Asner, D. M.
Aulchenko, V.
Aushev, T.
Ayad, R.
Aziz, T.
Bahinipati, S.
Bakich, A. M.
Bansal, V.
Barberio, E.
Bhuyan, B.
Bobrov, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
ÄŒervenkov, D.
Chen, A.
Cheon, B. G.
Chistov, R.
Cho, K.
Chobanova, V.
Choi, S. K.
Choi, Y.
Cinabro, D.
Dalseno, J.
Dingfelder, J.
DoleŽal, Z.
Drutskoy, A.
Dutta, D.
Eidelman, S.
Epifanov, D.
Farhat, H.
Fast, J. E.
Ferber, T.
Frost, O.
Gaur, V.
Gabyshev, N.
Garmash, A.
Getzkow, D.
Goh, Y. M.
Golob, B.
Grzymkowska, O.
Haba, J.
Hara, T.
Hayashii, H.
He, X. H.
Heller, A.
Horiguchi, T.
Hou, W. S.
Huschle, M.
Iijima, T.
Ishikawa, A.
Itoh, R.
Iwasaki, Y.
Jaegle, I.
Joffe, D.
Kang, K. H.
Kato, E.
Kawasaki, T.
Kiesling, C.
Kim, D. Y.
Kim, J. B.
Kim, J. H.
Kim, K. T.
Kim, M. J.
Kim, S. H.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Kodyš, P.
Korpar, S.
KriŽan, P.
Krokovny, P.
Kuhr, T.
Kumar, R.
Kuzmin, A.
Kwon, Y. J.
Lange, J. S.
Lee, I. S.
Li, Y.
Li Gioi, L.
Indian Institute of Technology, Madras
Liventsev, D.
Lukin, P.
Matvienko, D.
Miyabayashi, K.
Miyake, H.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Mohanty, S.
Moll, A.
Abstract
We report the first observation of B0→X(3872)(K+π-) and evidence for B+→X(3872)(K0π+). We measure the product of branching fractions for the former to be B(B0→X(3872)(K+π-))×B(X(3872)→J/ψπ+π-)=(7.9±1.3(stat)±0.4(syst))×10-6 and find that B0→X(3872)K∗(892)0 does not dominate the B0→X(3872)K+π- decay mode. We also measure B(B+→X(3872)(K0π+))×B(X(3872)→J/ψπ+π-)=(10.6±3.0(stat)±0.9(syst))×10-6. This study is based on the full data sample of 711fb-1 (772×106BB¯ pairs) collected at the Υ(4S) resonance with the Belle detector at the KEKB collider.
Volume
91