Observation of the decay B0-->lambda+cp.

N Gabyshev, H Kichimi, K Abe, K Abe, R Abe, T Abe, I Adachi, H Aihara,M Akatsu,Y Asano,T Aso, V Aulchenko, T Aushev, A M Bakich,Y Ban, E Banas, A Bay, I Bedny, I Bizjak, A Bondar, A Bozek, M Bracko, J Brodzicka, T E Browder, B C K Casey,M-C Chang,P Chang,Y Chao,K-F Chen, B G Cheon, R Chistov,S-K Choi, Y Choi, Y K Choi, M Danilov, L Y Dong, J Dragic, A Drutskoy, S Eidelman, V Eiges, Y Enari, F Fang, C Fukunaga, A Garmash, T Gershon, B Golob, J Haba, C Hagner, F Handa, T Hara, K Hasuko, H Hayashii,M Hazumi, I Higuchi, L Hinz, T Hojo, T Hokuue,Y Hoshi,W-S Hou, Y B Hsiung,H-C Huang,T Igaki, Y Igarashi, T Iijima, K Inami, A Ishikawa, R Itoh, H Iwasaki,Y Iwasaki, H K Jang,J H Kang,J S Kang, P Kapusta, S U Kataoka, N Katayama, H Kawai, H Kawai, T Kawasaki, D W Kim, H J Kim, H O Kim, Hyunwoo Kim, J H Kim, S K Kim,K Kinoshita,S Kobayashi, S Korpar, P Krizan, P Krokovny, R Kulasiri, A Kuzmin,Y-J Kwon, J S Lange, G Leder, S H Lee,J Li,S-W Lin, D Liventsev,R-S Lu, J MacNaughton, G Majumder, F Mandl, T Matsuishi, S Matsumoto, T Matsumoto, W Mitaroff,Y Miyabayashi,H Miyake,H Miyata, G R Moloney, T Mori, T Nagamine, Y Nagasaka,T Nakadaira, E Nakano, M Nakao, J W Nam, Z Natkaniec, S Nishida, O Nitoh,S Noguchi, T Nozaki, S Ogawa, T Ohshima, T Okabe, S Okuno, S L Olsen,Y Onuki, W Ostrowicz, H Ozaki,P Pakhlov, H Palka, C W Park,H Park,K S Park, L S Peak,J-P Perroud, L E Piilonen, M Rozanska, K Rybicki, H Sagawa,S Saitoh,Y Sakai, T R Sarangi, M Satapathy, A Satpathy, O Schneider, S Schrenk, J Schümann, A J Schwartz, S Semenov, K Senyo, R Seuster, M E Sevior, H Shibuya, B Shwartz, V Sidorov, J B Singh, N Soni, S Stanic, M Staric, A Sugi, A Sugiyama, K Sumisawa, T Sumiyoshi, S Suzuki, S Y Suzuki, S K Swain, T Takahashi, F Takasaki,K Tamai, N Tamura,J Tanaka,M Tanaka, G N Taylor, Y Teramoto, S Tokuda,T Tomura, T Tsuboyama, T Tsukamoto, S Uehara, Y Unno, S Uno, G Varner, K E Varvell, C C Wang, C H Wang, J G Wang, M-Z Wang,Y Watanabe, E Won, B D Yabsley, Y Yamada, A Yamaguchi,Y Yamashita,Y Yamashita,M Yamauchi, H Yanai, Y Yuan, Y Yusa, C C Zhang,Z P Zhang,Y Zheng, V Zhilich, D Zontar,

Physical review letters（2003）

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Abstract

We report the measurement of the charmed baryonic decay B(0)-->Lambda(+)(c)p with a branching fraction of (2.19(+0.56)(-0.49)+/-0.32+/-0.57)x10(-5) and a statistical significance of 5.8 sigma. The errors are statistical, systematic, and the error of the Lambda(+)(c)-->pK(-)pi(+) decay branching fraction. This is the first observation of a two-body baryonic B decay. The analysis is based on 78.2 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) collider.

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