2013/08/07 by LHCb collaboration, R. Aaij, B. Adeva +655 · 2 citations
Physics and Astronomy · #hep-ex
paper · pdf · doi:10.1103/physrevlett.111.191801
published as Phys. Rev. Lett. 111, 191801 (2013)
arxiv created 2013/08/07 · arxiv updated 2014/09/16
We present a measurement of form-factor independent angular observables in the decay \mboxB0→ K*(892)0μ+ μ-. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0fb-1, collected by the LHCb experiment in pp collisions at a center-of-mass energy of 7TeV. Four observables are measured in six bins of the dimuon invariant mass squared, q2, in the range 0.1<q2<19.0GeV2/c4. Agreement with Standard Model predictions is found for 23 of the 24 measurements. A local discrepancy, corresponding to 3.7 Gaussian standard deviations, is observed in one q2 bin for one of the observables. Considering the 24 measurements as independent, the probability to observe such a discrepancy, or larger, in one is 0.5%.