Energy Scan of the e+e- →hb (nP)π+π- (n=1, 2) Cross Sections and Evidence for Y(11020) Decays into Charged Bottomoniumlike States

R. Mizuk, A. Bondar, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, I. Badhrees, A. M. Bakich, E. Barberio, P. Behera, V. Bhardwaj, B. Bhuyan, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. BračkoT. E. Browder, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, R. Chistov, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, N. Dash, Z. DoleŽal, A. Drutskoy, S. Eidelman, D. Epifanov, T. Ferber, B. G. Fulsom, V. Gaur, A. Garmash, R. Gillard, Y. M. Goh, P. Goldenzweig, B. Golob, D. Greenwald, T. Hara, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Inami, G. Inguglia, A. Ishikawa, Y. Iwasaki, I. Jaegle, T. Julius, K. H. Kang, P. Katrenko, D. Y. Kim, H. J. Kim, J. B. Kim, K. T. Kim, M. J. Kim, S. H. Kim, Y. J. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Krokovny, T. Kuhr, A. Kuzmin, Y. J. Kwon, J. S. Lange, C. H. Li, H. Li, L. Li, L. Li Gioi, J. Libby, D. Liventsev, M. Lubej, T. Luo, M. Masuda, T. Matsuda, D. Matvienko, K. Miyabayashi, H. Miyata, G. B. Mohanty, A. Moll, E. Nakano, M. Nakao, T. Nanut, K. J. Nath, K. Negishi, M. Niiyama, N. K. Nisar, S. Nishida, S. Ogawa, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, B. Pal, C. W. Park, H. Park, S. Paul, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, C. Pulvermacher, M. Ritter, Y. Sakai, S. Sandilya, T. Sanuki, V. Savinov, T. Schlüter, O. Schneider, G. Schnell, C. Schwanda, Y. Seino, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, V. Shebalin, T. A. Shibata, J. G. Shiu, B. Shwartz, F. Simon, E. Solovieva, M. Starič, J. Stypula, T. Sumiyoshi, M. Takizawa, U. Tamponi, K. Tanida, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, C. Van Hulse, G. Varner, V. Vorobyev, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, K. M. Williams, E. Won, J. Yamaoka, Y. Yamashita, J. Yelton, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhukova, V. Zhulanov, A. Zupanc

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Abstract

Using data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider, we measure the energy dependence of the e+e-→hb(nP)π+π- (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear (10860) and (11020) peaks with little or no continuum contribution. We study the resonant substructure of the (11020)→hb(nP)π+π- transitions and find evidence that they proceed entirely via the intermediate isovector states Zb(10610) and Zb(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Zb(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Zb(10650) is produced is not excluded at a significant level.

Original languageEnglish
Article number142001
JournalPhysical review letters
Volume117
Issue number14
DOIs
Publication statusPublished - 2016 Sep 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Mizuk, R., Bondar, A., Adachi, I., Aihara, H., Asner, D. M., Atmacan, H., Aulchenko, V., Aushev, T., Ayad, R., Badhrees, I., Bakich, A. M., Barberio, E., Behera, P., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bonvicini, G., Bozek, A., ... Zupanc, A. (2016). Energy Scan of the e+e- →hb (nP)π+π- (n=1, 2) Cross Sections and Evidence for Y(11020) Decays into Charged Bottomoniumlike States. Physical review letters, 117(14), [142001]. https://doi.org/10.1103/PhysRevLett.117.142001