First Evidence of Direct CP Violation in Charmless Two-Body Decays of B0s Mesons

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; 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

First Evidence of Direct CP Violation in Charmless Two-Body Decays of B0s Mesons

Publication date

2019-05-22T11:16:32Z

2012-05-16

2019-05-22T11:16:32Z

Abstract

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 .