|
Search for \bar{B}^0 →Λ_c^+\bar{Λ}_c^- decay at Belle (2008) |
- Uchida, Y.,
- Ozaki, H.,
- Kichimi, H.,
- Adachi, I.,
- Aihara, H.,
- Arinstein, K.,
- Aushev, T.,
- Bakich, A. M.,
- Balagura, V.,
- Barberio, E.,
- Bay, A.,
- Shapkin, M.,
- Shen, C. P.,
- Shibuya, H.,
- Shwartz, B.,
- Singh, J. B.,
- Somov, A.,
- Stanic, S.,
- Staric, M.,
- Sumiyoshi, T.,
- Belous, K.,
- Suzuki, S.Y.,
- Takasaki, F.,
- Tanaka, M.,
- Taylor, G. N.,
- Teramoto, Y.,
- Tikhomirov, I.,
- Ueno, K.,
- Uglov, T.,
- Unno, Y.,
- Uno, S.,
- Bhardwaj, V.,
- Urquijo, P.,
- Usov, Y.,
- Varner, G.,
- Vervink, K.,
- Wang, C. C.,
- Wang, C. H.,
- Wang, P.,
- Watanabe, Y.,
- Wedd, R.,
- Bitenc, U.,
- Won, E.,
- Yamashita, Y.,
- Yamauchi, M.,
- Zhang, C. C.,
- Zhang, Z. P.,
- Zhulanov, V.,
- Zupanc, A.,
- Zyukova, O.,
- Bondar, A.,
- Bozek, A.,
- Bracˇko, M.,
- Browder, T. E.,
- Chao, Y.,
- Chen, A.,
- Chen, W. T.,
- Cheon, B. G.,
- Chistov, R.,
- Choi, Y.,
- Dalseno, J.,
- Dash, M.,
- Drutskoy, A.,
- Eidelman, S.,
- Gabyshev, N.,
- Golob, B.,
- Ha, H.,
- Haba, J.,
- Hayasaka, K.,
- Hazumi, M.,
- Heffernan, D.,
- Hoshi, Y.,
- Hsiung, Y. B.,
- Hyun, H. J.,
- Ikado, K.,
- Inami, K.,
- Ishikawa, A.,
- Itoh, R.,
- Iwabuchi, M.,
- Iwasaki, M.,
- Iwasaki, Y.,
- Kah, D. H.,
- Kaji, H.,
- Kang, J. H.,
- Katayama, N.,
- Kawai, H.,
- Kawasaki, T.,
- Kim, Y. J.,
- Kinoshita, K.,
- Korpar, S.,
- Krizˇan, P.,
- Krokovny, P.,
- Kuo, C. C.,
- Kuzmin, A.,
- Lee, J. S.,
- Lee, M. J.,
- Lee, S. E.,
- Lesiak, T.,
- Liventsev, D.,
- Mandl, F.,
- McOnie, S.,
- Medvedeva, T.,
- Mitaroff, W.,
- Miyake, H.,
- Miyata, H.,
- Miyazaki, Y.,
- Mizuk, R.,
- Moloney, G. R.,
- Nagasaka, Y.,
- Nakano, E.,
- Nakao, M.,
- Nakazawa, H.,
- Natkaniec, Z.,
- Nishida, S.,
- Nitoh, O.,
- Nozaki, T.,
- Ogawa, S.,
- Ohshima, T.,
- Okuno, S.,
- Olsen, S. L.,
- Pakhlov, P.,
- Pakhlova, G.,
- Park, C.W.,
- Park, H.,
- Peak, L. S.,
- Pestotnik, R.,
- Piilonen, L. E.,
- Sakai, Y.,
- Schneider, O.,
- Senyo, K.,
- Sevior, M. E.
|
Abstract |
|
We search for the doubly charmed baryonic decay \bar{B}^0 →Λ_c^+\bar{Λ}_c^-, in a data sample of 520×106 B\bar{B} events accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We find no significant signal and set an upper limit of B(\bar{B}^0 →Λ_c^+\bar{Λ}_c^-)< 6.2×10^{-5} at 90% confidence level. The result is significantly below a naive extrapolation from B(B^-→ Ξ\begin0\\c\end\bar{Λ}_c^-) assuming a simple Cabibbo-suppression factor of |V_cd/V_cs|^2. The small branching fraction may be attributed to a suppression due to the large momentum of the baryonic decay products, which has been observed in other charmed baryonic two-body B decays..
PHYSICAL REVIEW D. v.77, n.5, 2008, p.051101-1-051101-6 |
Publication details |
|