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oai:recercat.cat:2445/587892025-12-05T16:51:12Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

urn:hdl:2445/58789 Measurement of mixing and CP violation parameters in two-body charm decays 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 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 Hadrons Gravitació Relativitat (Física) Teoria quàntica Teoria quàntica de camps Hadrons Gravitation Relativity (Physics) Quantum theory Quantum field theory A study of mixing and indirect CP violation in D 0 mesons through the determination of the parameters y CP and A Γ is presented. The parameter y CP is the deviation from unity of the ratio of effective lifetimes measured in D 0 decays to the CP eigenstate K + K − with respect to decays to the Cabibbo favoured mode K −π+. The result measured using data collected by LHCb in 2010, corresponding to an integrated luminosity of 29 pb−1, is y CP = (5.5 ± 6.3stat ± 4.1syst) × 10−3. The parameter A Γ is the asymmetry of effective lifetimes measured in decays of D 0 and D¯¯¯0 mesons to K + K −. The result is A Γ = (−5.9 ± 5.9stat ± 2.1syst) × 10−3. A data-driven technique is used to correct for lifetime-biasing effects. 2014-10-20T10:33:17Z 2014-10-20T10:33:17Z 2012-04 2014-10-20T10:33:17Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1007/JHEP04(2012)129 Journal of High Energy Physics, 2012, vol. 4, p. 129 http://dx.doi.org/10.1007/JHEP04(2012)129 cc by (c) LHCb Collaboration, 2012 http://creativecommons.org/licenses/by/3.0/ info:eu-repo/semantics/openAccess Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)