Measurement of the B-s(0) - GT mu(+)mu(-) Branching Fraction and Search for B-0 - GT mu(+)mu(-) with the CMS Experiment
(ukupan broj autora: 2217)
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Results are presented from a search for the rare decays B-s(0) - GT mu(+) mu(-) and B-0 - GT mu(+) mu(-) in pp collisions at root s = 7 and 8 TeV, with data samples corresponding to integrated luminosities of 5 and 20 fb(-1), 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(B-s(0) - GT mu(+)mu(-)) = (3.0(-0.9)(+1.0)) x 10(-9), where the uncertainty includes both statistical and systematic contributions. An excess of B-s(0) - GT mu(+)mu(-) events with respect to background is observed with a significance of 4.3 standard deviations. For the decay B-0 - GT mu(+)mu(-) an upper limit of B(B-0 - GT mu(+) mu(-)) LT 1.1 x 10(-9) at the 95% confidence level is determined. Both results are in agreement with the expectations from the standard model.
Source:Physical Review Letters, 2013, 111, 10
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