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Title: Measurement of the CP Asymmetry in B-s(0) - (0)(s) Mixing
Author: Garrido Beltrán, Lluís
Graugés Pous, Eugeni
Rives Molina, Vicente José
Graciani Díaz, Ricardo
Picatoste Olloqui, Eduardo
Calvo Gómez, Míriam
Gascón Fora, David
Marín Benito, Carla
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Interaccions d'hadrons
Mesons (Física nuclear)
Violació CP (Física nuclear)
Hadron interactions
Mesons (Nuclear physics)
CP violation (Nuclear physics)
Issue Date: 5-Aug-2016
Publisher: American Physical Society
Abstract: The CP asymmetry in the mixing of B-s(0) and (B) over bar (0)(s) mesons is measured in proton-proton collision data corresponding to an integrated luminosity of 3.0 fb(-1), recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV. Semileptonic B-s(0) and (B) over bar (s) (0) decays are studied in the inclusive mode D-s(-/+)mu(+/-)nu((-)) X-mu with the D-s(-/+) mesons reconstructed in the K+K-pi(-/+) final state. Correcting the observed charge asymmetry for detection and background effects, the CP asymmetry is found to be a(sl)(s) = (0.39 +/- 0.26 +/- 0.20)%, where the first uncertainty is statistical and the second systematic. This is the most precise measurement of a(sl)(s) to date. It is consistent with the prediction from the standard model and will constrain new models of particle physics.
Note: Reproducció del document publicat a:
It is part of: Physical Review Letters, 2016, vol. 117, num. 6, p. 061803
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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