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A search for the decays Bs0→μ+μ− and B0→μ+μ− is performed with 0.37 fb−1 of pp collisions at s=7 TeV collected by the LHCb experiment in 2011. The upper limits on the branching fractions are B(Bs0→μ+μ−)<1.6×10−8 and B(B0→μ+μ−)<3.6×10−9 at 95% confidence level. A combination of these results with the LHCb limits obtained with the 2010 dataset leads to B(Bs0→μ+μ−)<1.4×10−8 and B(B0→μ+μ−)<3...
A search for the decays Bs0→μ+μ− and B0→μ+μ− is performed with about 37 pb−1 of pp collisions at s=7 TeV collected by the LHCb experiment at the Large Hadron Collider at CERN. The observed numbers of events are consistent with the background expectations. The resulting upper limits on the branching ratios are B(Bs0→μ+μ−)<5.6×10−8 and B(B0→μ+μ−)<1.5×10−8 at 95% confidence level.
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