159 articles – 2000 references  [version française]
 HAL: in2p3-00618367, version 1
 arXiv: 1107.2304
 ADS Bibliographic id: 2011PhRvL.107s1801A
 Physical Review Letters 107 (2011) 191801
 Search for Bs0→μ+μ- and B0→μ+μ- Decays with CDF II
 For the CDF collaboration(s)
 (2011-11)
 A search has been performed for Bs0→μ+μ- and B0→μ+μ- decays using 7fb-1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B0 candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of B(B0→μ+μ-)<6.0×10-9 at 95% confidence level. We observe an excess of Bs0 candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of Bs0→μ+μ- could produce such an excess or larger is 1.9%. These data are used to determine B(Bs0→μ+μ-)=(1.8-0.9+1.1)×10-8 and provide an upper limit of B(Bs0→μ+μ-)<4.0×10-8 at 95% confidence level.
 Research team: APC - AHE
 Subject(s) : Physics/High Energy Physics - ExperimentSciences of the Universe/Astrophysics/High Energy Astrophysical PhenomenaPhysics/Astrophysics/High Energy Astrophysical Phenomena
 Keyword(s) : Decays of bottom mesons – Neutral currents – Supersymmetric models