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Observation of the rare B0s→μ+μ− decay from the combined analysis of CMS and LHCb data

by Beaucourt, L. , Kurca, T. , Leroy, O. , Mamouni, H. El , Kanso, W. , Chefdeville, M. , Serrano, J. , Barsuk, S. , Depasse, P. , Sgandurra, L. , Beauceron, S. , Decamp, D. , Teklishyn, M. , Gouzevitch, M. , Nicol, M. , Montoya, C.A. Carrillo , Fan, J. , Lees, J.-P. , Verdier, P. , Lethuillier, M. , Alvarez, J.D. Ruiz , Fay, J. , Ghez, Ph , Khachatryan, V. , Mordà, A. , Chasserat, J. , Sabes, D. , Tsaregorodtsev, A. , Mancinelli, G. , Marchand, J.-F. , Borsato, M. , Martin Sanchez, A. , Schune, M.-H. , Gadrat, S. , Perries, S. , Viret, S. , Cogan, J. , Minard, M.-N. , Pietrzyk, B. , Lefrançois, J. , Brochet, S. , Vallier, A. , Machefert, F. , Qian, W. , Bouvier, E. , Chierici, R. , Contardo, D. , Viaud, B. , Boudoul, G. , Gascon, S. , Xiao, H. , Donckt, M. Vander , Aslanides, E. , Ille, B. , Tournefier, E. , Mirabito, L. , Akar, S. , Tisserand, V. , Sordini, V. , Amhis, Y. , Beaupere, N. , Robbe, P. , t'Jampens, S. , Legac, R. , Déléage, N. , Kochebina, O.

in High Energy Physics - Experiment / High Energy Physics - Phenomenology / Physics

2015

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Observation of the rare B0s→μ+μ− decay from the combined analysis of CMS and LHCb data

in High Energy Physics - Experiment / High Energy Physics - Phenomenology / Physics

2015

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Observation of the rare B0s→μ+μ− decay from the combined analysis of CMS and LHCb data

in High Energy Physics - Experiment / High Energy Physics - Phenomenology / Physics

2015

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Journal Article

Observation of the rare B0s→μ+μ− decay from the combined analysis of CMS and LHCb data

Beaucourt, L.,

Kurca, T.,

Leroy, O.,

Mamouni, H. El,

Kanso, W.,

Chefdeville, M.,

Serrano, J.,

Barsuk, S.,

Depasse, P.,

Sgandurra, L.,

Beauceron, S.,

Decamp, D.,

Teklishyn, M.,

Gouzevitch, M.,

Nicol, M.,

Montoya, C.A. Carrillo,

Fan, J.,

Lees, J.-P.,

Verdier, P.,

Lethuillier, M.,

Alvarez, J.D. Ruiz,

Fay, J.,

Ghez, Ph,

Khachatryan, V.,

Mordà, A.,

Chasserat, J.,

Sabes, D.,

Tsaregorodtsev, A.,

Mancinelli, G.,

Marchand, J.-F.,

Borsato, M.,

Martin Sanchez, A.,

Schune, M.-H.,

Gadrat, S.,

Perries, S.,

Viret, S.,

Cogan, J.,

Minard, M.-N.,

Pietrzyk, B.,

Lefrançois, J.,

Brochet, S.,

Vallier, A.,

Machefert, F.,

Qian, W.,

Bouvier, E.,

Chierici, R.,

Contardo, D.,

Viaud, B.,

Boudoul, G.,

Gascon, S.,

Xiao, H.,

Donckt, M. Vander,

Aslanides, E.,

Ille, B.,

Tournefier, E.,

Mirabito, L.,

Akar, S.,

Tisserand, V.,

Sordini, V.,

Amhis, Y.,

Beaupere, N.,

Robbe, P.,

t'Jampens, S.,

Legac, R.,

Déléage, N.,

Kochebina, O.

2015

Overview

A joint measurement is presented of the branching fractions B0s→μ+μ− and B0→μ+μ− 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 B0s→μ+μ− decay, with a statistical significance exceeding six standard deviations, and the best measurement of its branching fraction so far, and three standard deviation evidence for the B0→μ+μ− decay. The measurements are statistically compatible with SM predictions and impose stringent constraints on several theories beyond the SM.

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Publisher

Nature Publishing Group

Subject

High Energy Physics - Experiment

/ High Energy Physics - Phenomenology

/ Physics