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

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

doi:10.1038/nature14474

Journal articles

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

V. Khachatryan Y. Amhis ¹ S. Barsuk ¹ M. Borsato ¹ O. Kochebina ¹ J. Lefrançois ¹ F. Machefert ¹ A. Martin Sanchez ¹ Marie Nicol ¹ P. Robbe ¹ M.-H. Schune ¹ M. Teklishyn ¹ A. Vallier ¹ B. Viaud ¹ S. Beauceron ² N. Beaupere ² G. Boudoul E. Bouvier S. Brochet ² C.A. Carrillo Montoya ² J. Chasserat ² R. Chierici ² D. Contardo ² P. Depasse ² H. El Mamouni ² J. Fan ² J. Fay ² S. Gascon ² M. Gouzevitch ² B. Ille ² T. Kurca ² M. Lethuillier ² L. Mirabito ² S. Perries ² J.D. Ruiz Alvarez ² D. Sabes ² L. Sgandurra ² V. Sordini ² M. Vander Donckt ² P. Verdier ² S. Viret ² H. Xiao ² S. Gadrat ³ S. Akar ⁴ E. Aslanides ⁴ J. Cogan ⁴ W. Kanso ⁴ R. Legac ⁴ O. Leroy ⁴ G. Mancinelli ⁴ A. Mordà ⁴ J. Serrano ⁴ A. Tsaregorodtsev ⁴ L. Beaucourt ⁵ M. Chefdeville ⁵ D. Decamp ⁵ N. Déléage ⁵ Ph. Ghez ⁵ J.-P. Lees ⁵ J.-F. Marchand ⁵ M.-N. Minard ⁵ B. Pietrzyk ⁵ W. Qian ⁵ S. t'Jampens ⁵ V. Tisserand ⁵ E. Tournefier ⁵

1 LAL - Laboratoire de l'Accélérateur Linéaire

2 IPNL - Institut de Physique Nucléaire de Lyon

3 CC-IN2P3 - Centre de Calcul de l'IN2P3

4 CPPM - Centre de Physique des Particules de Marseille

5 LAPP - Laboratoire d'Annecy de Physique des Particules

Abstract : 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.

Document type :

Journal articles

Domain :

Physics [physics] / High Energy Physics - Experiment [hep-ex]

Physics [physics] / High Energy Physics - Phenomenology [hep-ph]

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http://hal.in2p3.fr/in2p3-01084204
Contributor : Sabine Starita <>
Submitted on : Tuesday, November 18, 2014 - 4:59:06 PM
Last modification on : Thursday, June 17, 2021 - 3:19:03 PM

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

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

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