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. 2004 Apr 2;92(13):131801.
doi: 10.1103/PhysRevLett.92.131801. Epub 2004 Apr 1.

Observation of B(+)-->pppi+, B0-->ppK0, and B(+)-->ppK(*+)

M-Z Wang  1 , K Abe, K Abe, T Abe, I Adachi, H Aihara, Y Asano, T Aso, V Aulchenko, T Aushev, A M Bakich, A Bay, I Bizjak, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, P Chang, Y Chao, K-F Chen, B G Cheon, R Chistov, S-K Choi, Y Choi, Y K Choi, P H Chu, A Chuvikov, M Danilov, L Y Dong, A Drutskoy, S Eidelman, V Eiges, C Fukunaga, N Gabyshev, A Garmash, T Gershon, G Gokhroo, B Golob, T Hara, H Hayashii, M Hazumi, T Hokuue, Y Hoshi, W-S Hou, H-C Huang, K Inami, A Ishikawa, R Itoh, H Iwasaki, M Iwasaki, Y Iwasaki, J H Kang, N Katayama, H Kawai, T Kawasaki, H Kichimi, H J Kim, Hyunwoo Kim, J H Kim, S K Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, A Kuzmin, Y-J Kwon, J S Lange, S H Lee, T Lesiak, A Limosani, S-W Lin, J MacNaughton, G Majumder, F Mandl, T Matsumoto, W Mitaroff, H Miyake, H Miyata, T Nagamine, Y Nagasaka, E Nakano, S Nishida, O Nitoh, S Ogawa, T Ohshima, S Okuno, S L Olsen, W Ostrowicz, H Ozaki, P Pakhlov, H Palka, C W Park, H Park, N Parslow, L E Piilonen, M Rozanska, H Sagawa, S Saitoh, Y Sakai, T R Sarangi, O Schneider, A J Schwartz, S Semenov, H Shibuya, V Sidorov, J B Singh, N Soni, S Stanic, M Staric, A Sugiyama, K Sumisawa, T Sumiyoshi, S Suzuki, S Y Suzuki, F Takasaki, K Tamai, N Tamura, M Tanaka, Y Teramoto, T Tomura, T Tsuboyama, T Tsukamoto, S Uehara, S Uno, G Varner, K E Varvell, C H Wang, J G Wang, Y Watanabe, Y Yamada, A Yamaguchi, Y Yamashita, M Yamauchi, H Yanai, J Ying, Y Yuan, Y Yusa, C C Zhang, Z P Zhang, V Zhilich, D Zontar; Belle Collaboration
Affiliations

Observation of B(+)-->pppi+, B0-->ppK0, and B(+)-->ppK(*+)

M-Z Wang et al. Phys Rev Lett. .

Abstract

We report the first observation of a b-->u type charmless baryonic B decay, B+-->pppi(+), as well as b-->s type B0-->ppK0 and B+-->ppK(*+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Upsilon(4S) resonance with the Belle detector at KEKB. We find B(B+-->pppi(+))=(3.06(+0.73)(-0.62)+/-0.37)x10(-6), B(B0-->ppK0)=(1.88(+0.77)(-0.60)+/-0.23)x10(-6), and B(B+-->ppK(*+))=(10.3(+3.6+1.3)(-2.8-1.7))x10(-6). We also update B(B+-->ppK+)=(5.66(+0.67)(-0.57)+/-0.62)x10(-6) and present an upper limit on B(B0-->ppK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.

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