Measurement of the branching fraction for the decay Υ(4S) →Υ(1S)π+π-

A. Sokolov, M. Shapkin, H. Aihara, K. Arinstein, T. Aushev, A. M. Bakich, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, A. Bondar, M. Bračko, T. E. Browder, M. C. Chang, P. Chang, A. Chen, K. F. Chen, B. G. Cheon, C. C. Chiang, R. ChistovI. S. Cho, Y. Choi, M. Dash, A. Drutskoy, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, P. Goldenzweig, H. Ha, J. Haba, B. Y. Han, H. Hayashii, M. Hazumi, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, Y. Iwasaki, N. J. Joshi, D. H. Kah, H. Kaji, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, S. K. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, P. Križan, P. Krokovny, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. E. Lee, T. Lesiak, J. Li, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, H. Miyata, Y. Miyazaki, R. Mizuk, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, A. Poluektov, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. Sekiya, K. Senyo, M. E. Sevior, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, S. Stanič, M. Starič, T. Sumiyoshi, M. Tanaka, G. N. Taylor, Y. Teramoto, T. Tsuboyama, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, K. Vervink, A. Vinokurova, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

We study transitions between Υ states with the emission of charged pions using 604.6fb-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured product branching fraction is B(Υ(4S)→Υ(1S)π+π-)×B(Υ(1S)→μ+μ-)=(2. 11±0.30(stat)±0.14(sys))×10-6 and the partial decay width is Γ(Υ(4S)→Υ(1S)π+π-)=(1.75±0.25(stat)±0. 24(sys))keV.

Original languageEnglish
Article number051103
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number5
DOIs
Publication statusPublished - 2009 Mar 2

All Science Journal Classification (ASJC) codes

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

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