Prim, M. T.Bernlochner, F. U.Prim, F. U. M. T.Goldenzweig, P.Heck, M.Adachi, IAdamczyk, K.Aihara, H.Al Said, S.Asner, D. M.Atmacan, H.Aulchenko, VAushev, T.Ayad, R.Babu, VBakich, A. M.Bansal, VBehera, P.Beleno, C.Bhardwaj, VBhuyan, B.Bilka, T.Biswal, J.Bobrov, A.Bozek, A.Bracko, M.Braun, N.Browder, T. E.Campajola, M.Cao, L.Cervenkov, D.Chang, P.Chekelian, VChen, A.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Choi, Y.Choudhury, S.Cinabro, D.Cunliffe, S.Dolezal, Z.Eidelman, S.Epifanov, D.Fast, J. E.Ferber, T.Fulsom, B. G.Garg, R.Gaur, VGarmash, A.Giri, A.Grzymkowska, O.Guan, Y.Haba, J.Hara, T.Hayasaka, K.Hayashii, H.Hou, W-SIijima, T.Inami, K.Inguglia, G.Ishikawa, A.Iwasaki, M.Iwasaki, Y.Jia, S.Jin, Y.Joffe, D.Joo, K. K.Kaliyar, A. B.Karyan, G.Kawasaki, T.Kichimi, H.Kiesling, C.Kim, C. H.Kim, D. Y.Kim, K. T.Kim, S. H.Kinoshita, K.Kody, P.Korpar, S.Kotchetkov, D.Krizan, P.Kroeger, R.Krokovny, P.Kuhr, T.Kulasiri, R.Kumar, R.Kumita, T.Kuzmin, A.Kwon, Y-JLalwani, K.Lange, J. S.Lee, I. S.Lee, J. K.Lee, J. Y.Lee, S. C.Lewis, P.Li, C. H.Li Gioi, L.Libby, J.Lieret, K.Liventsev, D.Lu, P-CLuo, T.MacNaughton, J.Masuda, M.Matsuda, T.Matvienko, D.Merola, M.Metzner, F.Miyabayashi, K.Mizuk, R.Mohanty, G. B.Mussa, R.Nakao, M.De Nardo, G.Nath, K. J.Natkaniec, Z.Nayak, M.Niiyama, M.Nisar, N. K.Nishida, S.Nishimura, K.Ogawa, S.Ono, H.Onuki, Y.Pakhlov, P.Pakhlova, G.Pal, B.Pardi, S.Park, H.Park, S-HPatra, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Popov, VPrencipe, E.Ritter, M.Rostomyan, A.Rozanska, M.Russo, G.Sahoo, D.Sakai, Y.Santelj, L.Savinov, VSchneider, O.Schnell, G.Schueler, J.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shebalin, VShiu, J-GShwartz, B.Simon, F.Sokolov, A.Solovieva, E.Staric, M.Strube, J. F.Sumihama, M.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tamponi, U.Tao, Y.Tenchini, F.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, S.Ushiroda, Y.Usov, Y.Vahsen, S. E.Van Tonder, R.Varner, G.Varvell, K. E.Vinokurova, A.Wang, B.Wang, C. H.Wang, M-ZWang, P.Watanuki, S.Won, E.Yang, S. B.Ye, H.Yin, J. H.Yusa, Y.Zhang, Z. P.Zhilich, VZhukova, VZhulanov, V2020-03-122020-03-122020-03-122020-02-2110.1103/PhysRevD.101.032007https://infoscience.epfl.ch/handle/20.500.14299/167229WOS:000515060600002We report the result for a search for the leptonic decay of B+ -> mu(+)nu mu using the full Belle dataset of 711 fb(-1) of integrated luminosity at the gamma(4S) resonance. In the Standard Model leptonic B-meson decays are helicity and Cabibbo-Kobayashi-Maskawa suppressed. To maximize sensitivity an inclusive tagging approach is used to reconstruct the second B meson produced in the collision. The directional information from this second B meson is used to boost the observed mu into the signal B-meson rest frame, in which the mu has a monochromatic momentum spectrum. Though its momentum is smeared by the experimental resolution, this technique improves the analysis sensitivity considerably. Analyzing the mu momentum spectrum in this frame we find B(B+ -> mu(+)nu mu)=(5.3 +/- 2.0 +/- 0.9) x 10(-7) with a one-sided significance of 2.8 standard deviations over the background-only hypothesis. This translates to a frequentist upper limit of B(B+ -> mu(+)nu mu) < 8.6 x 10(-7) at 90% confidence level. The experimental spectrum is then used to search for a massive sterile neutrino, B+ -> mu N+, but no evidence is observed for a sterile neutrino with a mass in a range of 01.5 GeV. The determined B+ -> mu(+)nu mu branching fraction limit is further used to constrain the mass and coupling space of the type II and type III two-Higgs-doublet models.Astronomy & AstrophysicsPhysics, Particles & FieldsAstronomy & AstrophysicsPhysicsneutral heavy-leptonscb-vertical-bardecaysidentificationlimitsmodeltext::journal::journal article::research article