Search for $B^+ \to e^+ ν$ and $B^+ \to μ^+ ν$ decays using hadronic tagging
Creators: name: Belle Collaboration
name: Yook, Y.
name: Kwon, Y. -J.
name: Abdesselam, A.
name: Adachi, I.
name: Said, S. Al
name: Arinstein, K.
name: Asner, D. M.
name: Aulchenko, V.
name: Aushev, T.
name: Ayad, R.
name: Bahinipati, S.
name: Bakich, A. M.
name: Bala, A.
name: Bansal, V.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bondar, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Doležal, Z.
name: Drásal, Z.
name: Drutskoy, A.
name: Dutta, D.
name: Dutta, K.
name: Eidelman, S.
name: Farhat, H.
name: Fast, J. E.
name: Ferber, T.
name: Frost, O.
name: Gaur, V.
name: Gabyshev, N.
name: Ganguly, S.
name: Garmash, A.
name: Gillard, R.
name: Glattauer, R.
name: Goh, Y. M.
name: Golob, B.
name: Grzymkowska, O.
name: Haba, J.
name: Hara, K.
name: Hayasaka, K.
name: Hayashii, H.
name: He, X. H.
name: Heck, M.
name: Higuchi, T.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Iijima, T.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, Y.
name: Iwashita, T.
name: Jaegle, I.
name: Julius, T.
name: Kato, E.
name: Katrenko, P.
name: Kawasaki, T.
name: Kiesling, C.
name: Kim, D. Y.
name: Kim, J. B.
name: Kim, J. H.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Klucar, J.
name: Ko, B. R.
name: Kodyš, P.
name: Korpar, S.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kuzmin, A.
name: Lange, J. S.
name: Li, Y.
name: Gioi, L. Li
name: Liu, C.
name: Liu, Y.
name: Liventsev, D.
name: Lukin, P.
name: Miyabayashi, K.
name: Miyata, H.
name: Mohanty, G. B.
name: Moll, A.
name: Mussa, R.
name: Nagasaka, Y.
name: Nakamura, I.
name: Nakano, E.
name: Nakao, M.
name: Natkaniec, Z.
name: Nayak, M.
name: Nedelkovska, E.
name: Nisar, N. K.
name: Nishida, S.
name: Nitoh, O.
name: Ogawa, S.
name: Okuno, S.
name: Pakhlov, P.
name: Park, C. -S.
name: Park, H.
name: Park, H. K.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Petrič, M.
name: Piilonen, L. E.
name: Ritter, M.
name: Röhrken, M.
name: Rostomyan, A.
name: Ryu, S.
name: Saito, T.
name: Sakai, Y.
name: Sandilya, S.
name: Santelj, L.
name: Sanuki, T.
name: Sato, Y.
name: Savinov, V.
name: Schneider, O.
name: Schnell, G.
name: Schwanda, C.
name: Senyo, K.
name: Seon, O.
name: Sevior, M. E.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Steder, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Tatishvili, G.
name: Teramoto, Y.
name: Trabelsi, K.
name: Uchida, M.
name: Uglov, T.
name: Urquijo, P.
name: Usov, Y.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: Varvell, K. E.
name: Vinokurova, A.
name: Vorobyev, V.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, M. -Z.
name: Wang, P.
name: Wang, X. L.
name: Watanabe, M.
name: Watanabe, Y.
name: Wehle, S.
name: Williams, K. M.
name: Won, E.
name: Yamashita, Y.
name: Yashchenko, S.
name: Yusa, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present a search for the rare leptonic decays $B^+ \to e^+ ν_e$ and $B^+ \to μ^+ ν_μ$, using the full $Υ(4S)$ data sample of $772\times 10^6$ $B\bar{B}$ pairs collected with the Belle detector at the $\small\textbf{KEKB}$ asymmetric-energy $e^+ e^-$ collider. One of the $B$ mesons from the $Υ(4S) \to B\bar{B}$ decay is fully reconstructed in a hadronic mode, while the recoiling side is analyzed for the signal decay. We find no evidence of a signal in any of the decay modes. Upper limits of the corresponding branching fractions are determined as ${\cal B}(B^+ \to e^+ ν_e)&lt;3.5\times 10^{-6}$ and ${\cal B}(B^+ \to μ^+ ν_μ)&lt;2.7 \times 10^{-6}$ at 90$\%$ confidence level.
description: 13 pages, 7 figures, Submitted to PRD