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. CheonC. 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, Eunil Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, T. Zivko, O. Zyukova

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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 - 2010 Jun 8

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Louvot, R., Schneider, O., Aushev, T., Arinstein, K., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Belous, K., Bischofberger, M., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chao, Y., Chen, A., Chen, K. F., Chen, P., ... Zyukova, O. (2010). Observation of Bs0→Ds*-π+ and Bs0→Ds(*) -ρ+ and measurement of the Bs0→Ds*-ρ+ longitudinal polarization fraction. Physical Review Letters, 104(23), [231801]. https://doi.org/10.1103/PhysRevLett.104.231801