We present a measurement of form-factor-independent angular observables in the decay B0 → K*(892)0 μ+ μ−. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0  fb^−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^2 in the range 0.1 < q^2 < 19.0 GeV^2/c^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^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%.

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2013). Measurement of Form-Factor-Independent Observables in the Decay B0 → K*0 μ+ μ−. PHYSICAL REVIEW LETTERS, 111(19), 1-8 [10.1103/PhysRevLett.111.191801].

Measurement of Form-Factor-Independent Observables in the Decay B0 → K*0 μ+ μ−

CARBONE, ANGELO;A. Di Canto;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

We present a measurement of form-factor-independent angular observables in the decay B0 → K*(892)0 μ+ μ−. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0  fb^−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^2 in the range 0.1 < q^2 < 19.0 GeV^2/c^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^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%.
2013
Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2013). Measurement of Form-Factor-Independent Observables in the Decay B0 → K*0 μ+ μ−. PHYSICAL REVIEW LETTERS, 111(19), 1-8 [10.1103/PhysRevLett.111.191801].
Aaij, R.; Adeva, B.; Adinolfi, M.; Adrover, C.; Affolder, A.; Ajaltouni, Z.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/193929
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