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Measurement of the decays B -> eta lv(l) and B -> eta ' lv(l) in fully reconstructed events at Belle
- Authors
- Beleno, C.; Dingfelder, J.; Urquijo, P.; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bakich, A. M.; Bansal, V.; Behera, P.; Bhuyan, B.; Biswal, J.; Bobrov, A.; Bracko, M.; Browder, T. E.; Cervenkov, D.; Chen, A.; Cheon, B. G.; Chistov, R.; Cho, K.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Dash, N.; Di Carlo, S.; Dolezal, Z.; Eidelman, S.; Farhat, H.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gillard, R.; Goldenzweig, P.; Hara, T.; Hayashii, H.; Hedges, M. T.; Hou, W. -S.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, Y.; Jeon, H. B.; Jin, Y.; Joffe, D.; Joo, K. K.; Kang, K. H.; Karyan, G.; Kim, D. Y.; Kim, J. B.; Kim, K. T.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Kodys, P.; Korpar, S.; Kotchetkov, D.; Krizan, P.; Krokovny, P.; Kulasiri, R.; Lee, I. S.; Li, Y.; Gioi, L. Li; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Matvienko, D.; Miyabayashi, K.; Miyata, H.; Moon, H. K.; Mori, T.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Nayak, M.; Nishida, S.; Ogawa, S.; Okuno, S.; Ono, H.; Pal, B.; Park, C. -S.; Park, C. W.; Park, H.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Ritter, M.; Sakai, Y.; Salehi, M.; Sandilya, S.; Sanuki, T.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Seon, O.; Sevior, M. E.; Shebalin, V.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Solovieva, E.; Staric, M.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Usov, Y.; Van Hulse, C.; Varner, G.; Varvell, K. E.; Vinokurova, A.; Vorobyev, V.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, Y.; Widmann, E.; Won, E.; Yamashita, Y.; Ye, H.; Yelton, J.; Yook, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Zupanc, A.
- Issue Date
- 28-11월-2017
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.96, no.9
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 96
- Number
- 9
- ISSN
- 2470-0010
- Abstract
- We report branching fraction measurements of the decays B+ -> eta l(+)v(l) and B+ -> eta'l(+)v(l) based on 711 fb(-1) of data collected near the (sic)(4S) resonance with the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. This data sample contains 772 million B (B) over bar events. One of the two B mesons is fully reconstructed in a hadronic decay mode. Among the remaining ("signal-B") daughters, we search for the eta meson in two decay channels, eta -> gamma gamma and eta -> pi(+)pi(-)pi(0), and reconstruct the eta' meson in eta' -> eta pi(+)pi(-) with subsequent decay of the eta into gamma gamma Combining the two. modes and using an extended maximum likelihood, the B+ -> eta l(+)v(l) branching fraction is measured to be (4.2 +/- 1.1 (stat.) +/- 0.3 (syst.)) x 10(-5). For B+ -> eta l(+)v(l),we observe no significant signal and set an upper limit of 0.72 x 10(-4) at 90% confidence level.
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