Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/119271
Title: Angular analysis of the B0 → K*0μ+μ− decay using 3 fb−1 of integrated luminosity
Author: Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marín Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Badalov, Alexey
LHCb Collaboration
Keywords: Interaccions d'hadrons
Partícules (Física nuclear)
Hadron interactions
Particles (Nuclear physics)
Issue Date: 16-Feb-2016
Publisher: Springer Verlag
Abstract: An angular analysis of the B0 → K∗0 (→ K+π−)µ+µ− decay is presented. The dataset corresponds to an integrated luminosity of 3.0 fb−1 of pp collision data collected at the LHCb experiment. The complete angular information from the decay is used to determine CP-averaged observables and CP asymmetries, taking account of possible contamination from decays with the K+π− system in an S-wave configuration. The angular observables and their correlations are reported in bins of q2, the invariant mass squared of the dimuon system. The observables are determined both from an unbinned maximum likelihood fit and by using the principal moments of the angular distribution. In addition, by fitting for q2-dependent decay amplitudes in the region 1.1 < q2 < 6.0 GeV2/c4, the zero-crossing points of several angular observables are computed. A global fit is performed to the complete set of CP-averaged observables obtained from the maximum likelihood fit. This fit indicates differences with predictions based on the Standard Model at the level of 3.4 standard deviations. These differences could be explained by contributions from physics beyond the Standard Model, or by an unexpectedly large hadronic effect that is not accounted for in the Standard Model predictions.
Note: Reproducció del document publicat a: https://doi.org/10.1007/JHEP02(2016)104
It is part of: Journal of High Energy Physics, 2016, vol. 2016, num. 104
URI: http://hdl.handle.net/2445/119271
Related resource: https://doi.org/10.1007/JHEP02(2016)104
ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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