Compact Muon Solenoid
LHC, CERN
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| CMS-BPH-13-004-003 ; CERN-PH-EP-2013-129 | ||
| Measurement of the B0s→μ+μ− branching fraction and search for B0→μ+μ− with the CMS Experiment | ||
| CMS Collaboration | ||
| 19 July 2013 | ||
| Phys. Rev. Lett. 111 (2013) 101804 | ||
| Abstract: Results are presented from a search for the rare decays B0s→μ+μ− and B0→μ+μ− in pp collisions at √s=7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 inverse femtobarns, respectively, collected by the CMS experiment at the LHC. An unbinned maximum-likelihood fit to the dimuon invariant mass distribution gives a branching fraction B(B0s→μ+μ−)=(3.0+1.0−0.9)×10−9, where the uncertainty includes both statistical and systematic contributions. An excess of B0s→μ+μ− events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B0→μ+μ− an upper limit of B(B0→μ+μ−)<1.1×10−9 at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model. | ||
| Links: e-print arXiv:1307.5025 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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