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. 2004 Sep 24;93(13):131803.
doi: 10.1103/PhysRevLett.93.131803. Epub 2004 Sep 23.

Evidence for B+-->omegal+nu

C Schwanda  1 , K Abe, K Abe, T Abe, I Adachi, H Aihara, M Akatsu, Y Asano, T Aushev, S Bahinipati, A M Bakich, Y Ban, E Banas, A Bay, I Bizjak, A Bondar, A Bozek, M Bracko, T E Browder, M-C Chang, Y Chao, B G Cheon, Y Choi, Y K Choi, A Chuvikov, S Cole, M Danilov, M Dash, L Y Dong, A Drutskoy, S Eidelman, V Eiges, N Gabyshev, T Gershon, G Gokhroo, B Golob, M Hazumi, I Higuchi, L Hinz, T Hokuue, Y Hoshi, W-S Hou, H-C Huang, T Iijima, K Inami, A Ishikawa, R Itoh, H Iwasaki, M Iwasaki, J H Kang, J S Kang, P Kapusta, N Katayama, H Kawai, H Kichimi, H J Kim, K Kinoshita, P Koppenburg, S Korpar, P Krizan, P Krokovny, S Kumar, Y-J Kwon, J S Lange, G Leder, S H Lee, T Lesiak, J Li, A Limosani, S-W Lin, J MacNaughton, F Mandl, T Matsumoto, A Matyja, Y Mikami, W Mitaroff, H Miyake, H Miyata, T Mori, T Nagamine, Y Nagasaka, E Nakano, M Nakao, Z Natkaniec, S Nishida, O Nitoh, 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, N Parslow, L S Peak, L E Piilonen, H Sagawa, S Saitoh, Y Sakai, T R Sarangi, O Schneider, J Schümann, A J Schwartz, S Semenov, K Senyo, M E Sevior, H Shibuya, J B Singh, N Soni, R Stamen, S Stanic, M Staric, K Sumisawa, T Sumiyoshi, S Suzuki, O Tajima, F Takasaki, K Tamai, M Tanaka, Y Teramoto, T Tomura, T Tsukamoto, S Uehara, T Uglov, K Ueno, S Uno, G Varner, K E Varvell, C C Wang, C H Wang, B D Yabsley, Y Yamada, A Yamaguchi, Y Yamashita, H Yanai, J Ying, Z P Zhang, D Zontar, D Zürcher; Belle Collaboration
Affiliations

Evidence for B+-->omegal+nu

C Schwanda et al. Phys Rev Lett. .

Abstract

We have searched for the decay B+-->omegal(+)nu (l=e or mu) in 78 fb(-1) of Upsilon(4S) data (85x10(6)BB events) accumulated with the Belle detector. The final state is fully reconstructed using the omega decay into pi(+)pi(-)pi(0), combined with detector hermeticity to estimate the neutrino momentum. A signal of 414+/-125 events is found in the data, corresponding to a branching fraction of (1.3+/-0.4+/-0.2+/-0.3)x10(-4), where the first two errors are statistical and systematic, respectively. The third error reflects the estimated form-factor uncertainty.

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