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Observation of Bs0→Ds*-π+ and Bs0→Ds(*) -ρ+ and measurement of the Bs0→Ds*-ρ+ longitudinal polarization fraction

  • R. Louvot
  • , O. Schneider
  • , T. Aushev
  • , K. Arinstein
  • , A. M. Bakich
  • , V. Balagura
  • , E. Barberio
  • , A. Bay
  • , K. Belous
  • , M. Bischofberger
  • , A. Bondar
  • , A. Bozek
  • , M. Bračko
  • , T. E. Browder
  • , P. Chang
  • , Y. Chao
  • , A. Chen
  • , K. F. Chen
  • , P. Chen
  • , B. G. Cheon
  • C. C. Chiang, I. S. Cho, Y. Choi, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, P. Goldenzweig, B. Golob, H. Ha, J. Haba, T. Hara, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, D. H. Kah, J. H. Kang, P. Kapusta, N. Katayama, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, C. Liu, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, M. Nakao, H. Nakazawa, S. Nishida, K. Nishimura, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, H. Palka, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, M. Prim, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, C. Schwanda, A. J. Schwartz, K. Senyo, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, J. B. Singh, P. Smerkol, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, Y. Unno, S. Uno, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M. Z. Wang, P. Wang, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, T. Zivko, O. Zyukova
  • ENAC-IIC-GEL
  • Institute for Theoretical and Experimental Physics
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Novosibirsk State University
  • University of Sydney
  • University of Melbourne
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • Nara Women's University
  • Institute for Nuclear Physics
  • Department of Biochemistry and Molecular and Structural Biology
  • University of Maribor
  • University of Hawaii
  • National Taiwan University
  • National Central University
  • Hanyang University
  • Yonsei University
  • Sungkyunkwan University
  • Virginia Polytechnic Institute and State University
  • University of Cincinnati
  • University of Ljubljana
  • Korea University
  • High Energy Accelerator Research Organization (KEK)
  • Tohoku University
  • Tohoku Gakuin University
  • Kyungpook National University
  • Nagoya University
  • University of Tokyo
  • Tata Institute of Fundamental Research, Mumbai
  • Niigata University
  • Max-Planck-Institut für Physik
  • Korea Institute of Science and Technology Information
  • The Graduate University for Advanced Studies
  • Charles University
  • Tokyo Metropolitan University
  • Justus-Liebig-Universität Giessen
  • Seoul National University
  • University of Science and Technology of China
  • Tokyo University of Agriculture and Technology
  • Kanagawa University
  • Institute of Meteorology and Climate Research
  • Institut für Hochenergiephysik
  • Panjab University
  • University of Nova Gorica
  • Osaka City University
  • National United University Taiwan
  • Nippon Dental University

Research output: Contribution to journalArticlepeer-review

Abstract

First observations of the Bs0→Ds*-π+, Bs0→Ds-ρ+ and Bs0→Ds*-ρ+ decays are reported together with measurements of their branching fractions: B(Bs0→Ds*-π+)=[2.4-0.4+0.5(stat)±0.3(syst) ±0.4(fs)]×10-3, B(Bs0→Ds-ρ+)=[8.5-1. 2+1.3(stat)±1.1(syst)±1.3(fs)]×10-3 and B(Bs0→Ds*-ρ+)=[11.9-2.0+2.2(stat)±1.7(syst) ±1.8(fs)]×10-3 (fs=NBs(*)B̄s(*)/ Nbb̄). From helicity-angle distributions, we measured the longitudinal polarization fraction in Bs0→Ds*-ρ+ decays to be fL(Bs0→Ds*-ρ+)=1.05-0.10+0.08(stat)-0.04+0.03(syst). These results are based on a 23.6fb-1 data sample collected at the Υ(5S) resonance with the Belle detector at the KEKB e+e - collider.

Original languageEnglish
Article number231801
JournalPhysical Review Letters
Volume104
Issue number23
DOIs
Publication statusPublished - 8 Jun 2010
Externally publishedYes

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