Measurement of the CP Asymmetry in B-s(0) - (0)(s) Mixing

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...

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Detalles Bibliográficos
Autores: Garrido Beltrán, Lluís, Graugés Pous, Eugeni, Rives Molina, Vicente José, Graciani Díaz, Ricardo, Picatoste Olloqui, Eduardo, Calvo Gómez, Míriam, Gascón Fora, David, Marin Benito, Carla, Vilasis-Cardona, Xavier, LHCb Collaboration
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/114424
Acceso en línea:https://hdl.handle.net/2445/114424
Access Level:acceso abierto
Palabra clave:Interaccions d'hadrons
Mesons (Física nuclear)
Violació CP (Física nuclear)
Hadron interactions
Mesons (Nuclear physics)
CP violation (Nuclear physics)
Descripción
Sumario: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.

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