Authors
Albert M Sirunyan, Armen Tumasyan, Wolfgang Adam, Federico Ambrogi, Thomas Bergauer, Johannes Brandstetter, Marko Dragicevic, Janos Erö, Alberto Escalante Del Valle, Martin Flechl, Rudolf Fruehwirth, Manfred Jeitler, Natascha Krammer, Ilse Krätschmer, Dietrich Liko, Thomas Madlener, Ivan Mikulec, Navid Rad, Jochen Schieck, Robert Schöfbeck, Markus Spanring, Daniel Spitzbart, Wolfgang Waltenberger, C-E Wulz, Mateusz Zarucki, Vladimir Drugakov, MR Darwish, EA De Wolf, D Di Croce, X Janssen, A Lelek, M Pieters, H Rejeb Sfar, H Van Haevermaet, P Van Mechelen, S Van Putte, F Blekman, ES Bols, SS Chhibra, J D’Hondt, J De Clercq, D Lontkovskyi, S Lowette, I Marchesini, S Moortgat, Q Python, K Skovpen, S Tavernier, W Van Doninck, P Van Mulders, D Beghin, B Bilin, H Brun, B Clerbaux, G De Lentdecker, H Delannoy, B Dorney, L Favart, A Grebenyuk, AK Kalsi, A Popov, N Postiau, E Starling, L Thomas, C Vander Velde, P Vanlaer, D Vannerom, T Cornelis, D Dobur, I Khvastunov, M Niedziela, C Roskas, M Tytgat, W Verbeke, B Vermassen, M Vit, O Bondu, G Bruno, C Caputo, P David, C Delaere, M Delcourt, A Giammanco, V Lemaitre, J Prisciandaro, A Saggio, M Vidal Marono, P Vischia, J Zobec, FL Alves, GA Alves, G Correia Silva, C Hensel, A Moraes, P Rebello Teles, E Belchior Batista Das Chagas, W Carvalho, J Chinellato, E Coelho, EM Da Costa, GG Da Silveira, D De Jesus Damiao, C De Oliveira Martins, S Fonseca De Souza, LM Huertas Guativa, H Malbouisson, J Martins, D Matos Figueiredo, M Medina Jaime, M Melo De Almeida, C Mora Herrera, L Mundim, H Nogima, WL Prado Da Silva, LJ Sanchez Rosas, A Santoro, A Sznajder, M Thiel, EJ Tonelli Manganote, F Torres Da Silva De Araujo, A Vilela Pereira, CA Bernardes, L Calligaris, TR Fernandez Perez Tomei, EM Gregores, DS Lemos, PG Mercadante, SF Novaes, SandraS Padula, A Aleksandrov, G Antchev, R Hadjiiska, P Iaydjiev, M Misheva, M Rodozov, M Shopova, G Sultanov, M Bonchev, A Dimitrov, T Ivanov, L Litov, B Pavlov, P Petkov, W Fang, X Gao, L Yuan, M Ahmad, Z Hu, Y Wang, GM Chen
Publication date
2020/4
Journal
Journal of High Energy Physics
Volume
2020
Issue
4
Pages
1-49
Publisher
Springer Berlin Heidelberg
Description
Results are reported for the→ μ+ μ− branching fraction and effective lifetime and from a search for the decay B 0→ μ+ μ−. The analysis uses a data sample of proton-proton collisions accumulated by the CMS experiment in 2011, 2012, and 2016, with center-of-mass energies (integrated luminosities) of 7 TeV (5 fb− 1), 8 TeV (20 fb− 1), and 13 TeV (36 fb− 1). The branching fractions are determined by measuring event yields relative to B+→ J/ψK+ decays (with J/ψ→ μ+ μ−), which results in the reduction of many of the systematic uncertainties. The decay→ μ+ μ− is observed with a significance of 5.6 standard deviations. The branching fraction is measured to be\(\mathrm {\mathcal {B}}\left ({\mathrm {B}} _ {\mathrm {s}}^ 0\to {\upmu}^{+}{\upmu}^{-}\right)=\left [2.9\pm 0.7\left (\exp\right)\pm 0.2\left (\mathrm {frag}\right)\right]\times {10}^{-9}\), where the first uncertainty combines the experimental statistical and systematic …
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