Evidence for B+ → ωl+v

C. Schwanda, 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. Bračko, T. E. Browder, M. C. ChangY. 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. Križan, 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. Schumann, A. J. Schwartz, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, J. B. Singh, N. Soni, R. Stamen, S. Stanič, M. Starič, 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. Žontar, D. Zürcher

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Abstract

The decay of B+ → ωl+ν (l = e or μ) in 78 fb-1 of υ(4S) data accumulated with the Belle detector is discussed. To estimate the neutrino momentum, the final state is fully reconstructed using the ω decay into π+π -π0, combined with detector hermeticity. It is found that corresponding to a branching fraction of (1.3±0.4±0.2±0.3) × 10-4, a signal of 414±125 events is found in the data, where the first two errors are systematic and statistical, respectively. The estimated form-factor uncertainty is reflected from the third error.

Original languageEnglish
Article number131803
Pages (from-to)131803-1-131803-5
JournalPhysical review letters
Volume93
Issue number13
DOIs
Publication statusPublished - 2004 Sep 24

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Schwanda, C., Abe, K., Abe, K., Abe, T., Adachi, I., Aihara, H., Akatsu, M., Asano, Y., Aushev, T., Bahinipati, S., Bakich, A. M., Ban, Y., Banas, E., Bay, A., Bizjak, I., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., ... Zürcher, D. (2004). Evidence for B+ → ωl+v. Physical review letters, 93(13), 131803-1-131803-5. [131803]. https://doi.org/10.1103/PhysRevLett.93.131803