Search for $B^{-}\to\mu^{-}\bar\nu_\mu$ Decays at the Belle Experiment

Belle Collaboration,; Sibidanov, A.; Varvell, K. E.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Badhrees, I.; Bahinipati, S.; Bakich, A. M.; Bansal, V.; Barberio, E.; Behera, P.; Bhuyan, B.; Biswal, J.; Bozek, A.; Bračko, M.; Browder, T. E.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Czank, T.; Dash, N.; Di Carlo, S.; Doležal, Z.; Drásal, Z.; Dutta, D.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Fulsom, B. G.; Gaur, V.; Gabyshev, N.; Garmash, A.; Goldenzweig, P.; Greenwald, D.; Guan, Y.; Guido, E.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hedges, M. T.; Hirose, S.; Hou, W. -S.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jaegle, I.; Jeon, H. B.; Jin, Y.; Joo, K. K.; Julius, T.; Kahn, J.; Kaliyar, A. B.; Kang, K. H.; Karyan, G.; Kawasaki, T.; Kiesling, C.; Kim, D. Y.; Kim, J. B.; Kim, S. H.; Kim, Y. J.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kumar, R.; Kuzmin, A.; Kwon, Y. -J.; Lange, J. S.; Lee, I. S.; Li, C. H.; Li, L.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lubej, M.; Luo, T.; Masuda, M.; Matsuda, T.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Moon, H. K.; Mori, T.; Mussa, R.; Nakano, E.; Nakao, M.; Nanut, T.; Nath, K. J.; Natkaniec, Z.; Nayak, M.; Niiyama, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Okuno, S.; Ono, H.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Park, C. -S.; Park, C. W.; Park, H.; Paul, S.; Pestotnik, R.; Piilonen, L. E.; Ritter, M.; Rostomyan, A.; Rozanska, M.; Sakai, Y.; Salehi, M.; Sandilya, S.; Sato, Y.; Savinov, V.; Schneider, O.; Schnell, G.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shebalin, V.; Shen, C. P.; Shibata, T. -A.; Shiu, J. -G.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Strube, J. F.; Sumihama, M.; Sumisawa, K.; Sumiyoshi, T.; Takizawa, M.; Tamponi, U.; Tanida, K.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Van Hulse, C.; Varner, G.; Vorobyev, V.; Wang, C. H.; Wang, M. -Z.; Wang, P.; Watanabe, M.; Watanuki, S.; Widmann, E.; Won, E.; Yamashita, Y.; Ye, H.; Yelton, J.; Yuan, C. Z.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.; Zupanc, A.

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Search for $B^{-}\to\mu^{-}\bar\nu_\mu$ Decays at the Belle Experiment

MPS-Authors

Belle Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sibidanov, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Varvell, K. E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Adachi, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Aihara, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Al Said, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Asner, D. M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Aushev, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ayad, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Babu, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Badhrees, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bahinipati, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bakich, A. M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bansal, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Barberio, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Behera, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bhuyan, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Biswal, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bozek, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bračko, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Browder, T. E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Červenkov, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Chang, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Chekelian, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Chen, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Cheon, B. G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Chilikin, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Cho, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Choi, S. -K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Choi, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Cinabro, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Czank, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Dash, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Di Carlo, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Doležal, Z.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Drásal, Z.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Dutta, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Eidelman, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Epifanov, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Fast, J. E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ferber, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Fulsom, B. G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gaur, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gabyshev, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Garmash, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Goldenzweig, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Greenwald, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Guan, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Guido, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Haba, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hayasaka, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hayashii, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hedges, M. T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hirose, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hou, W. -S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hsu, C. -L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Iijima, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Inami, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Inguglia, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ishikawa, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Itoh, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Iwasaki, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Iwasaki, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Jacobs, W. W.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Jaegle, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Jeon, H. B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Jin, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Joo, K. K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Julius, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kahn, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kaliyar, A. B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kang, K. H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Karyan, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kawasaki, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kiesling, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kim, D. Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kim, J. B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kim, S. H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kim, Y. J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kinoshita, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kodyš, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Korpar, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kotchetkov, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Križan, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Krokovny, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kuhr, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kulasiri, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kumar, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kuzmin, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kwon, Y. -J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lange, J. S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lee, I. S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Li, C. H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Li, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Li Gioi, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Libby, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Liventsev, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lubej, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Luo, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Masuda, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Matsuda, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Merola, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Miyabayashi, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Miyata, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Mizuk, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Mohanty, G. B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Moon, H. K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Mori, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Mussa, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nakano, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nakao, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nanut, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nath, K. J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Natkaniec, Z.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nayak, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Niiyama, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nisar, N. K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nishida, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ogawa, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Okuno, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ono, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pakhlov, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pakhlova, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pal, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Park, C. -S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Park, C. W.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Park, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Paul, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pestotnik, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Piilonen, L. E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ritter, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Rostomyan, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Rozanska, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sakai, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Salehi, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sandilya, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sato, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Savinov, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schneider, O.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schnell, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schwanda, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Seino, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Senyo, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sevior, M. E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shebalin, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shen, C. P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shibata, T. -A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shiu, J. -G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Simon, F.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sokolov, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Solovieva, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Starič, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Strube, J. F.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sumihama, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sumisawa, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sumiyoshi, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Takizawa, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Tamponi, U.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Tanida, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Tenchini, F.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Trabelsi, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Uchida, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Uehara, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Uglov, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Unno, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Uno, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Urquijo, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Van Hulse, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Varner, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Vorobyev, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wang, C. H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wang, M. -Z.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wang, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Watanabe, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Watanuki, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Widmann, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Won, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Yamashita, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ye, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Yelton, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Yuan, C. Z.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Yusa, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhang, Z. P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhilich, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhukova, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhulanov, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zupanc, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

Belle Collaboration, Sibidanov, A., Varvell, K. E., Adachi, I., Aihara, H., Al Said, S., et al. (2018). Search for $B^{-}\to\mu^{-}\bar\nu_\mu$ Decays at the Belle Experiment. Physical Review Letters, (121), 031801. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2017-318.

Cite as: https://hdl.handle.net/21.11116/0000-0003-F833-C

Abstract

We report the result of a search for the decay $B^{-}\to\mu^{-}\bar\nu_\mu$. The signal events are selected based on the presence of a high momentum muon and the topology of the rest of the event showing properties of a generic $B$-meson decay, as well as the missing energy and momentum being consistent with the hypothesis of a neutrino from the signal decay. We find a 2.4 standard deviation excess above background including systematic uncertainties, which corresponds to a branching fraction of ${\cal B}(B^{-}\to\mu^{-}\bar\nu_\mu) =(6.46 \pm 2.22 \pm 1.60 )\times10^{-7}$ or a frequentist 90% confidence level interval on the $B^{-}\to\mu^{-}\bar\nu_\mu$ branching fraction of $[2.9, 10.7]\times 10^{-7}$. This result is obtained from a $711\ \text{fb}^{-1}$ data sample that contains $772 \times 10^6$ $B\bar{B}$ pairs, collected near the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.