Observation of X (3872) in B →x (3872)Kπ decays

A. Bala, V. Bhardwaj, K. Trabelsi, J. B. Singh, A. Abdesselam, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, S. Bahinipati, A. M. Bakich, V. Bansal, E. Barberio, B. Bhuyan, A. Bobrov, G. BonviciniA. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, R. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, J. Dingfelder, Z. DoleŽal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, O. Frost, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, Y. M. Goh, B. Golob, O. Grzymkowska, J. Haba, T. Hara, H. Hayashii, X. H. He, A. Heller, T. Horiguchi, W. S. Hou, M. Huschle, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, K. H. Kang, E. Kato, T. Kawasaki, C. Kiesling, D. Y. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, T. Kuhr, R. Kumar, A. Kuzmin, Y. J. Kwon, J. S. Lange, I. S. Lee, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyake, H. Miyata, R. Mizuk, G. B. Mohanty, S. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, M. Nayak, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, E. RibeŽl, M. Ritter, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, M. Starič, M. Steder, M. Sumihama, T. Sumiyoshi, K. Tanida, G. Tatishvili, Y. Teramoto, F. Thorne, V. Trusov, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, P. Vanhoefer, G. Varner, A. Vinokurova, V. Vorobyev, M. N. Wagner, C. H. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, Eunil Won, H. Yamamoto, Y. Yamashita, S. Yashchenko, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, M. Ziegler, A. Zupanc

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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.

Original languageEnglish
Article number051101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume91
Issue number5
DOIs
Publication statusPublished - 2015 Mar 2

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    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., ... Zupanc, A. (2015). Observation of X (3872) in B →x (3872)Kπ decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91(5), [051101]. https://doi.org/10.1103/PhysRevD.91.051101