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arXiv · 1504.05831

Search for B+ -> l+ nu gamma decays with hadronic tagging using the full Belle data sample

A. Heller·P. Goldenzweig·M. Heck·T. Kuhr·A. Zupanc·A. Abdesselam·I. Adachi·K. Adamczyk·H. Aihara·K. Arinstein·D. M. Asner·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·I. Badhrees·A. M. Bakich·E. Barberio·V. Bhardwaj·B. Bhuyan·A. Bondar·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·D. Červenkov·A. Chen·B. G. Cheon·K. Cho·V. Chobanova·Y. Choi·D. Cinabro·M. Danilov·Z. Doležal·Z. Drásal·A. Drutskoy·D. Dutta·S. Eidelman·H. Farhat·J. E. Fast·M. Feindt·T. Ferber·B. G. Fulsom·V. Gaur·N. Gabyshev·A. Garmash·D. Getzkow·R. Gillard·R. Glattauer·Y. M. Goh·B. Golob·J. Haba·K. Hayasaka·X. H. He·T. Horiguchi·W. -S. Hou·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·Y. Iwasaki·I. Jaegle·D. Joffe·E. Kato·P. Katrenko·T. Kawasaki·D. Y. Kim·H. J. Kim·J. B. Kim·J. H. Kim·K. T. Kim·S. H. Kim·K. Kinoshita·B. R. Ko·P. Kodyš·S. Korpar·P. Križan·P. Krokovny·T. Kumita·A. Kuzmin·Y. -J. Kwon·J. S. Lange·I. S. Lee·P. Lewis·J. Libby·P. Lukin·D. Matvienko·K. Miyabayashi·H. Miyata·R. Mizuk·G. B. Mohanty·A. Moll·H. K. Moon·R. Mussa·E. Nakano·M. Nakao·T. Nanut·Z. Natkaniec·M. Nayak·N. K. Nisar
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Abstract

We search for the decay B+ -> l+ nu gamma with l+ = e+ or mu+ using the full Belle data set of 772 x 10^6 BBbar pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We reconstruct one B meson in a hadronic decay mode and search for the B+ -> l+ nu gamma decay in the remainder of the event. We observe no significant signal within the phase space of E_gamma^sig > 1 GeV and obtain upper limits of BR(B+ -> e+ nu gamma) < 6.1 x 10^-6, BR(B+ -> mu+ nu gamma) < 3.4 x 10^-6, and BR(B+ -> l+ nu gamma) < 3.5 x 10^-6 at 90 % credibility level.

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A. Heller, P. Goldenzweig, M. Heck, T. Kuhr, A. Zupanc, A. Abdesselam, I. Adachi, K. Adamczyk, H. Aihara, K. Arinstein, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, E. Barberio, V. Bhardwaj, B. Bhuyan, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, D. Červenkov, A. Chen, B. G. Cheon, K. Cho, V. Chobanova, Y. Choi, D. Cinabro, M. Danilov, Z. Doležal, Z. Drásal, A. Drutskoy, D. Dutta, S. Eidelman, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, D. Getzkow, R. Gillard, R. Glattauer, Y. M. Goh, B. Golob, J. Haba, K. Hayasaka, X. H. He, T. Horiguchi, W. -S. Hou, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, D. Joffe, E. Kato, P. Katrenko, T. Kawasaki, D. Y. Kim, H. J. Kim, J. B. Kim, J. H. Kim, K. T. Kim, S. H. Kim, K. Kinoshita, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. -J. Kwon, J. S. Lange, I. S. Lee, P. Lewis, J. Libby, P. Lukin, D. Matvienko, K. Miyabayashi, H. Miyata, R. Mizuk, G. B. Mohanty, A. Moll, H. K. Moon, R. Mussa, E. Nakano, M. Nakao, T. Nanut, Z. Natkaniec, M. Nayak, N. K. Nisar. 2015-04-22. Search for B+ -> l+ nu gamma decays with hadronic tagging using the full Belle data sample. https://doi.org/10.1103/physrevd.91.112009

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