Observation of the decay B̄0→Ds+Λp̄

T. Medvedeva, R. Chistov, K. Abe, K. Abe, I. Adachi, H. Aihara, D. Anipko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. BrowderM. C. Chang, P. Chang, Y. Chao, A. Chen, W. T. Chen, B. G. Cheon, Y. Choi, Y. K. Choi, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, B. Golob, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Imoto, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. Kichimi, Y. J. Kim, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, S. McOnie, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, T. Mori, Y. Nagasaka, M. Nakao, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, Y. Onuki, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, N. Satoyama, T. Schietinger, O. Schneider, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. B. Singh, A. Sokolov, A. Somov, N. Soni, S. Stanič, M. Starič, H. Stoeck, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, I. Tikhomirov, T. Tsuboyama, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, Z. P. Zhang, A. Zupanc

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Abstract

We report the first observation of the decay B̄0→Ds+Λ p̄ with a statistical significance of 6.6σ. We measure B(B̄0→Ds+Λp̄)=(2.9±0.7±0.5±0.4) ×10-5, where the first error is statistical, the second is systematic, and the third error comes from the uncertainty in B(Ds+→π+). The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the KEKB asymmetric-energy e+e- collider. The integrated luminosity of the data sample is 414fb-1, corresponding to 449×106 BB̄ pairs.

Original languageEnglish
Article number051102
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume76
Issue number5
DOIs
Publication statusPublished - 2007 Sep 12

ASJC Scopus subject areas

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

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    Medvedeva, T., Chistov, R., Abe, K., Abe, K., Adachi, I., Aihara, H., Anipko, D., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Belous, K., Bitenc, U., Bizjak, I., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., ... Zupanc, A. (2007). Observation of the decay B̄0→Ds+Λp̄. Physical Review D - Particles, Fields, Gravitation and Cosmology, 76(5), [051102]. https://doi.org/10.1103/PhysRevD.76.051102