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00925njm 22002777a 4500 dc Abellan Beteta, Carlos author Calvo Gómez, Míriam author Camboni, Alessandro author Comerma Montells, Albert author Domingo Bonal, Francesc author Garrido Beltrán, Lluís author Gascón Fora, David author Grabalosa Gándara, Marc author Graciani Díaz, Ricardo author Graugés Pous, Eugeni author López Asamar, Elias author Pérez-Calero Yzquierdo, Antonio author Picatoste Olloqui, Eduardo author Pie Valls, B. (Blai) author Potterat, Cédric author Puig Navarro, Albert author Roselló, M. author Ruiz, Hugo (Ruiz Pérez) author Vázquez Gómez, Ricard author Vilasis-Cardona, Xavier author LHCb Collaboration author 2019-05-22T11:16:32Z 2019-05-22T11:16:32Z 2012-05-16 2019-05-22T11:16:32Z Using a data sample corresponding to an integrated luminosity of 0.35     fb − 1 collected by LHCb in 2011, we report the first evidence of C P violation in the decays of B 0 s mesons to K ± π ∓ pairs, A C P ( B 0 s → K π ) = 0.27 ± 0.08 ( stat ) ± 0.02 ( syst ) , with a significance of 3.3 σ . Furthermore, we report the most precise measurement of C P violation in the decays of B 0 mesons to K ± π ∓ pairs, A C P ( B 0 → K π ) = − 0.088 ± 0.011 ( stat ) ± 0.008 ( syst ) , with a significance exceeding 6 σ . Física de partícules Experiments Particle physics Experiments First Evidence of Direct CP Violation in Charmless Two-Body Decays of B0s Mesons