Observation of the rare $B^0_s\to\mu^+\mu^-$ decay from the combined analysis of CMS and LHCb data

Observation of the rare $B^0_s\to\mu^+\mu^-$ decay from the combined analysis of CMS and LHCb data

Nature 522, 68-72 (04 June 2015) A joint measurement is presented of the branching fractions $B^0_s\to\mu^+\mu^-$ and $B^0\to\mu^+\mu^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at...

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Hauptverfasser: Reis, T, Castello, R, Komm, M, Selvaggi, M, Brito, L, Kovac, M, Raidal, M, Dejardin, M, Sirois, Y, Costanza, F, Krücker, D, Blobel, V, Garutti, E, Veszpremi, V, Kalsi, A. K, Bonacorsi, D, Fasanella, D, Meschini, M, Cavallo, N, Branca, A, Lacaprara, S, Zucchetta, A, Re, V, Degano, A, Solano, A, Tamponi, U, Oh, Y. D, Linares, E. Casimiro, Pineda, A. Morelos, Khan, W. A, Boimska, B, Nguyen, F, Oreshkin, V, Andreev, Yu, Rivero, C. Martinez, Sanchez, F. J. Munoz, Vila, I, Bonato, A, Giordano, D, Perez, E, Bachmair, F, Buchmann, M. A, Lange, C, Lin, W, Petrakou, E, Bilin, B, Paramesvaran, S, Brown, R. M, Rogerson, S, Virdee, T, Valuev, V, Burt, K, Long, O. R, Tucker, J, Apollinari, G, Fisk, I, Green, D, Johnson, M, Spalding, W. J, Bourilkov, D, Onel, Y, Rahmat, R, Gritsan, A. V, Skuja, A, Bauer, G, Lai, Y. S, Turkewitz, J, Kharchilava, A, Odell, N, Hebda, P, Michlin, B, Somalwar, S, Thomassen, P, Gándara, M. Grabalosa, Schune, M. -H, Seyfert, P, Falabella, A, Lanfranchi, G, Stroili, R, Stracka, S, Suárez, A. Dosil, Gligorov, V. V, Langhans, B, Ruf, T, Subbiah, V. K, Garcia, M. Ubeda, Wyllie, K, Fitzpatrick, C, La Thi, V. N, Rouvinet, J, Oggero, S, Pellegrino, A, Pritchard, A, Sutcliffe, W, Capriotti, L, Dujany, G, Lupton, O, Hamilton, B, Gui, B, Rodriguez, J. Molina
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Sprache:eng
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Physics - High Energy Physics - Experiment
Physics - High Energy Physics - Phenomenology
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Zusammenfassung:Nature 522, 68-72 (04 June 2015) A joint measurement is presented of the branching fractions $B^0_s\to\mu^+\mu^-$ and $B^0\to\mu^+\mu^-$ in proton-proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. The combined analysis produces the first observation of the $B^0_s\to\mu^+\mu^-$ decay, with a statistical significance exceeding six standard deviations, and the best measurement of its branching fraction so far. Furthermore, evidence for the $B^0\to\mu^+\mu^-$ decay is obtained with a statistical significance of three standard deviations. The branching fraction measurements are statistically compatible with SM predictions and impose stringent constraints on several theories beyond the SM.
DOI:10.48550/arxiv.1411.4413