“School of Particles”
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| Paper IPM / Particles / 12093 |
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A search for the rare decays B0s-m+m- and B0 - m+m- is performed in pp collisions at sqrt(s) = 7 TeV, with a data sample corresponding to an integrated luminosity of 1.14 fb
-1 , collected by the CMS experiment at the LHC. In both cases, the number of events observed after all selection requirements is consistent with expectations from background and standard-model signal predictions. The resulting upper limits on the branching fractions are B(B0s - m+m-) < 1.9* 10 power (-8)and B(B0 - m+m-) < 4.6 * 10 power(-9), at 95
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