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oai:recercat.cat:2445/1336972025-12-04T21:30:57Zcom_2072_1057col_2072_478812col_2072_478822col_2072_478823col_2072_478904col_2072_478917

urn:hdl:2445/133697 Evidence for CP Violation in Time-Integrated D0→h−h+ Decay Rates Abellan Beteta, Carlos Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Domingo Bonal, Francesc Garrido Beltrán, Lluís Gascón Fora, David Grabalosa Gándara, Marc Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias Musy, Marco Pérez-Calero Yzquierdo, Antonio Picatoste Olloqui, Eduardo Pie Valls, B. (Blai) Potterat, Cédric Puig Navarro, Albert Roselló, M. Ruiz, Hugo (Ruiz Pérez) Vázquez Gómez, Ricard Vilasis-Cardona, Xavier LHCb Collaboration Física de partícules Experiments Particle physics Experiments A search for time-integrated C P violation in D 0 → h − h + ( h = K , π ) decays is presented using 0.62     fb − 1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D * + → D 0 π + and D * − → ¯¯¯ D 0 π − decay chains. The difference in C P asymmetry between D 0 → K − K + and D 0 → π − π + , Δ A C P ≡ A C P ( K − K + ) − A C P ( π − π + ) , is measured to be [ − 0.82 ± 0.21 ( stat ) ± 0.11 ( syst ) ] % . This differs from the hypothesis of C P conservation by 3.5 standard deviations. 2019-05-22T11:42:21Z 2019-05-22T11:42:21Z 2012-03-12 2019-05-22T11:42:21Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.108.111602 Physical Review Letters, 2012, vol. 108, num. 11, p. 111602 https://doi.org/10.1103/PhysRevLett.108.111602 cc by (c) CERN; LHCb Collaboration, 2012 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)