Measurement of Form-Factor-Independent Observables in the Decay B[ superscript 0] → K[superscript *0]μ[superscript +]μ[superscript -]
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We present a measurement of form-factor-independent angular observables in the decay B[superscript 0] → K[superscript *](892)[superscript 0]μ[superscript +]μ[superscript −]. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1], collected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. Four observables are measured in six bins of the dimuon invariant mass squared q[superscript 2] in the range 0.1 < q[superscript 2] < 19.0 GeV[superscript 2]/c[superscript 4]. Agreement with recent theoretical predictions of the standard model is found for 23 of the 24 measurements. A local discrepancy, corresponding to 3.7 Gaussian standard deviations is observed in one q[superscript 2] 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%.
DepartmentMassachusetts Institute of Technology. Department of Physics
Physical Review Letters
American Physical Society
Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Measurement of Form-Factor-Independent Observables in the Decay B[ superscript 0] → K[superscript *0]μ[superscript +]μ[superscript -].” Physical Review Letters 111, no. 19 (November 2013). © 2013 CERN, for the LHCb collaboration
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