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Title: | First Observation of CP Violation in the Decays of B0s Mesons |
Author: | Abellan Beteta, Carlos Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias Oyanguren Campos, Arantza de Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Potterat, Cédric Rives Molina, Vicente José Ruiz, Hugo (Ruiz Pérez) Ruiz Valls, Pablo Vázquez Gómez, Ricard Vilasis-Cardona, Xavier LHCb Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 30-May-2013 |
Publisher: | American Physical Society |
Abstract: | Using p p collision data corresponding to an integrated luminosity of 1.0 fb − 1 and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct C P violation in B 0 s → K − π + decays, A C P ( B 0 s → K − π + ) = 0.27 ± 0.04 ( stat ) ± 0.01 ( syst ) , with significance exceeding 5 standard deviations. This is the first observation of C P violation in the decays of B 0 s mesons. Furthermore, we provide an improved determination of direct C P violation in B 0 → K + π − decays, A C P ( B 0 → K + π − ) = − 0.080 ± 0.007 ( stat ) ± 0.003 ( syst ) , which is the most precise measurement of this quantity to date. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.110.221601 |
It is part of: | Physical Review Letters, 2013, vol. 110, num. 22, p. 221601 |
URI: | http://hdl.handle.net/2445/133350 |
Related resource: | https://doi.org/10.1103/PhysRevLett.110.221601 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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