First observation of the Zb0(10610) in a Dalitz analysis of Υ(10860)→Υ(nS)π0π0

P. Krokovny, A. Bondar, I. Adachi, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, A. Bala, A. Bay, V. Bhardwaj, B. Bhuyan, G. Bonvicini, C. Bookwalter, A. Bozek, M. Bračko, T. E. Browder, P. ChangA. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. Chistov, I. S. Cho, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, J. Dingfelder, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, E. Kato, H. Kawai, T. Kawasaki, C. Kiesling, D. Y. Kim, H. O. Kim, J. B. Kim, J. H. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, T. Kuhr, T. Kumita, A. Kuzmin, Youngjoon Kwon, J. S. Lange, S. H. Lee, J. Li, Y. Li, J. Libby, Y. Liu, Z. Q. Liu, D. Liventsev, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, N. Muramatsu, R. Mussa, Y. Nagasaka, M. Nakao, M. Nayak, E. Nedelkovska, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, C. Oswald, G. Pakhlova, C. W. Park, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, M. Ritter, M. Röhrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, L. Santelj, T. Sanuki, Y. Sato, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, S. E. Vahsen, C. Van Hulse, P. Vanhoefer, G. Varner, V. Vorobyev, M. N. Wagner, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

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Abstract

We report the first observation of Υ(10860)→Υ(1,2,3S) π0π0 decays. The neutral partner of the Zb±(10610), the Zb0(10610) decaying to Υ(2,3S)π0, is observed for the first time with a 6.5σ significance using a Dalitz analysis of Υ(10860)→Υ(2,3S) π0π0 decays. The results are obtained with a 121.4 fb-1 data sample collected with the Belle detector at the Υ(10860) resonance at the KEKB asymmetric-energy e+e- collider.

Original languageEnglish
Article number052016
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume88
Issue number5
DOIs
Publication statusPublished - 2013 Sep 20

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Krokovny, P., Bondar, A., Adachi, I., Aihara, H., Arinstein, K., Asner, D. M., Aulchenko, V., Aushev, T., Aziz, T., Bakich, A. M., Bala, A., Bay, A., Bhardwaj, V., Bhuyan, B., Bonvicini, G., Bookwalter, C., Bozek, A., Bračko, M., Browder, T. E., ... Zupanc, A. (2013). First observation of the Zb0(10610) in a Dalitz analysis of Υ(10860)→Υ(nS)π0π0. Physical Review D - Particles, Fields, Gravitation and Cosmology, 88(5), [052016]. https://doi.org/10.1103/PhysRevD.88.052016