Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data

Research output: Contribution to journal › Article › peer-review

Standard

Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data. / The CMS Collaboration; LHCb Collaboration.

In: Nature, Vol. 522, No. 7554, 04.06.2015, p. 68-72.

Research output: Contribution to journal › Article › peer-review

Harvard

The CMS Collaboration & LHCb Collaboration 2015, 'Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data', Nature, vol. 522, no. 7554, pp. 68-72. https://doi.org/10.1038/nature14474

APA

The CMS Collaboration, & LHCb Collaboration (2015). Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data. Nature, 522(7554), 68-72. https://doi.org/10.1038/nature14474

Vancouver

The CMS Collaboration, LHCb Collaboration. Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data. Nature. 2015 Jun 4;522(7554):68-72. https://doi.org/10.1038/nature14474

Author

The CMS Collaboration ; LHCb Collaboration. / Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data. In: Nature. 2015 ; Vol. 522, No. 7554. pp. 68-72.

Bibtex

@article{74dcdb66615543a198df2a8567e84121,
title = "Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data",
abstract = "The standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strangeB meson (B0 s ) andtheB0meson decaying into two oppositely charged muons (μ+ and μ-) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0 s→μ+μ- and B0 s→μ+μ- decays are very rare, with about four of the former occurring for every billion B0 s mesons produced, and one of the latter occurring for every ten billion B0 mesons1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (CompactMuonSolenoid) andLHCb(LargeHadronCollider beauty) collaborations have performed a joint analysis of the data from proton'proton collisions that they collected in 2011 at a centre-ofmass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0 s→μ+μ- decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0 s→μ+μ- decay with a statistical significance of three standard deviations. Both measurements are statistically compatible with standard model predictions and allow stringent constraints to be placed on theories beyond the standardmodel. The LHCexperimentswill resume taking data in 2015, recording proton'proton collisions at a centre-of-mass energy of 13 teraelectronvolts, which will approximately double the production rates of B0 s and B0 mesons and lead to further improvements in the precision of these crucial tests of the standard model.",
author = "{The CMS Collaboration} and {LHCb Collaboration} and V. Khachatryan and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and T. Bergauer and M. Dragicevic and J. Er{\"o} and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and W. Kiesenhofer and V. Kn{\"u}nz and M. Krammer and I. Kr{\"a}tschmer and D. Liko and I. Mikulec and D. Rabady and B. Rahbaran and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and W. Treberer-Treberspurg and W. Waltenberger and Wulz, {C. E.} and V. Mossolov and N. Shumeiko and {Suarez Gonzalez}, J. and S. Alderweireldt and S. Bansal and T. Cornelis and {De Wolf}, {E. A.} and X. Janssen and A. Knutsson and Worm, {S. D.} and Parkinson, {C. J.} and D. Popov and S. Bifani and N. Farley and P. Griffith and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and L. Pescatore and Watson, {N. K.} and P. Ilten",
year = "2015",
month = jun,
day = "4",
doi = "10.1038/nature14474",
language = "English",
volume = "522",
pages = "68--72",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7554",

}

RIS

TY - JOUR

T1 - Observation of the rare B0 s→μ+μ- decay from the combined analysis of CMS and LHCb data

AU - The CMS Collaboration

AU - LHCb Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Knünz, V.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Treberer-Treberspurg, W.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Suarez Gonzalez, J.

AU - Alderweireldt, S.

AU - Bansal, S.

AU - Cornelis, T.

AU - De Wolf, E. A.

AU - Janssen, X.

AU - Knutsson, A.

AU - Worm, S. D.

AU - Parkinson, C. J.

AU - Popov, D.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Pescatore, L.

AU - Watson, N. K.

AU - Ilten, P.

PY - 2015/6/4

Y1 - 2015/6/4

N2 - The standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strangeB meson (B0 s ) andtheB0meson decaying into two oppositely charged muons (μ+ and μ-) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0 s→μ+μ- and B0 s→μ+μ- decays are very rare, with about four of the former occurring for every billion B0 s mesons produced, and one of the latter occurring for every ten billion B0 mesons1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (CompactMuonSolenoid) andLHCb(LargeHadronCollider beauty) collaborations have performed a joint analysis of the data from proton'proton collisions that they collected in 2011 at a centre-ofmass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0 s→μ+μ- decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0 s→μ+μ- decay with a statistical significance of three standard deviations. Both measurements are statistically compatible with standard model predictions and allow stringent constraints to be placed on theories beyond the standardmodel. The LHCexperimentswill resume taking data in 2015, recording proton'proton collisions at a centre-of-mass energy of 13 teraelectronvolts, which will approximately double the production rates of B0 s and B0 mesons and lead to further improvements in the precision of these crucial tests of the standard model.

AB - The standard model of particle physics describes the fundamental particles and their interactions via the strong, electromagnetic and weak forces. It provides precise predictions for measurable quantities that can be tested experimentally. The probabilities, or branching fractions, of the strangeB meson (B0 s ) andtheB0meson decaying into two oppositely charged muons (μ+ and μ-) are especially interesting because of their sensitivity to theories that extend the standard model. The standard model predicts that the B0 s→μ+μ- and B0 s→μ+μ- decays are very rare, with about four of the former occurring for every billion B0 s mesons produced, and one of the latter occurring for every ten billion B0 mesons1. A difference in the observed branching fractions with respect to the predictions of the standard model would provide a direction in which the standard model should be extended. Before the Large Hadron Collider (LHC) at CERN2 started operating, no evidence for either decay mode had been found. Upper limits on the branching fractions were an order of magnitude above the standard model predictions. The CMS (CompactMuonSolenoid) andLHCb(LargeHadronCollider beauty) collaborations have performed a joint analysis of the data from proton'proton collisions that they collected in 2011 at a centre-ofmass energy of seven teraelectronvolts and in 2012 at eight teraelectronvolts. Here we report the first observation of the B0 s→μ+μ- decay, with a statistical significance exceeding six standard deviations, and the best measurement so far of its branching fraction. Furthermore, we obtained evidence for the B0 s→μ+μ- decay with a statistical significance of three standard deviations. Both measurements are statistically compatible with standard model predictions and allow stringent constraints to be placed on theories beyond the standardmodel. The LHCexperimentswill resume taking data in 2015, recording proton'proton collisions at a centre-of-mass energy of 13 teraelectronvolts, which will approximately double the production rates of B0 s and B0 mesons and lead to further improvements in the precision of these crucial tests of the standard model.

UR - http://www.scopus.com/inward/record.url?scp=84930946686&partnerID=8YFLogxK

U2 - 10.1038/nature14474

DO - 10.1038/nature14474

M3 - Article

AN - SCOPUS:84930946686

VL - 522

SP - 68

EP - 72

JO - Nature

JF - Nature

SN - 0028-0836

IS - 7554

ER -