Details

Autor(en) / Beteiligte

• 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.

Titel

Search for B − → μ − ν ¯ μ Decays at the Belle Experiment

Ist Teil von

• Physical review letters, 2018-07, Vol.121 (3), p.031801, Article 031801

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report the results of a search for the rare, purely leptonic decay B−→μ−ν¯μ performed with a 711  fb−1 data sample that contains 772×106  BB¯ pairs, collected near the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e− collider. 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 B(B−→μ−ν¯μ)=(6.46±2.22±1.60)×10−7 or a frequentist 90% confidence level interval on the B−→μ−ν¯μ branching fraction of [2.9,10.7]×10−7.