Observation of B+→Ξ̄c0Λc+ and evidence for B0→Ξ̄c-Λc+

R. Chistov, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, V. Aulchenko, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, I. Bizjak, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. BrowderY. Chao, A. Chen, W. T. Chen, B. G. Cheon, S. K. Choi, Y. Choi, Y. K. Choi, A. Chuvikov, S. Cole, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, A. Go, B. Golob, A. Gorišek, H. C. Ha, J. Haba, K. Hayasaka, H. Hayashii, M. Hazumi, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, A. Ishikawa, M. Iwasaki, Y. Iwasaki, P. Kapusta, N. Katayama, T. Kawasaki, H. R. Khan, H. Kichimi, H. J. Kim, S. M. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, C. C. Kuo, A. Kuzmin, Y. J. Kwon, G. Leder, T. Lesiak, S. W. Lin, D. Liventsev, J. MacNaughton, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, J. Mueller, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, H. Park, K. S. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, Y. Sakai, N. Sato, N. Satoyama, T. Schietinger, O. Schneider, K. Senyo, M. E. Sevior, B. Shwartz, V. Sidorov, A. Somov, R. Stamen, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, X. C. Tian, T. Tsukamoto, S. Uehara, T. Uglov, K. Ueno, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, M. Z. Wang, E. Won, Q. L. Xie, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, J. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich

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Abstract

We report the first observation of the decay B+→Ξ̄c0Λc+ with a significance of 8.7σ and evidence for the decay B0→Ξ̄c-Λc+ with a significance of 3.8σ. The product B(B+→Ξ̄c0Λc+)×B(Ξ̄c0→Ξ̄+π-) is measured to be (4.8-0.9+1.0±1.1±1.2)×10-5, and B(B0→Ξ̄c-Λc+)×B(Ξ̄c-→Ξ̄+π- π-) is measured to be (9.3-2.8+3.7±1.9±2.4)×10-5. The errors are statistical, systematic and the error of the Λc+→pK-π+ branching fraction, respectively. The decay B+→Ξ̄c0Λc+ is the first example of a two-body exclusive B+ decay into two charmed baryons. The data used for this analysis was accumulated at the Υ(4S) resonance, using the Belle detector at the e+e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample is equal to 357fb-1, corresponding to 386×106 BB̄ pairs.

Original languageEnglish
Article number111105
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number11
DOIs
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

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

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