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Differential branching fraction and angular analysis of the decay B 0 → K ∗0 μ + μ -

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The angular distribution and differential branching fraction of the decay B 0→ K ∗0 μ + μ − are studied using a data sample, collected by the LHCb experiment in pp collisions at s√=7 TeV, corresponding to an integrated luminosity of 1.0 fb−1. Several angular observables are measured in bins of the dimuon invariant mass squared, q 2. A first measurement of the zero-crossing point of the forward-backward asymmetry of the dimuon system is also presented. The zero-crossing point is measured to be q20=4.9±0.9GeV2/c4 , where the uncertainty is the sum of statistical and systematic uncertainties. The results are consistent with the Standard Model predictions.

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Journal of High Energy Physics, 2013, vol. 8, num. 131, p. 1-31

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Differential branching fraction and angular analysis of the decay B 0 → K ∗0 μ + μ -