Publication

First Evidence of Direct CP Violation in Charmless Two-Body Decays of B-s(0) Mesons

Olivier Schneider, Aurelio Bay, Guido Haefeli, Tatsuya Nakada, Frédéric Blanc, Yasmine Sara Amhis, Julien Rouvinet, Barinjaka Rakotomiaramanana, Raluca Anca Muresan, Johan Luisier, Anne Keune, Vincent Fave, Hubert Degaudenzi, Mathias Oleg Knecht
2012
Journal Articles

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 CP violation in the decays of B-s(0) mesons to K-+/-pi(-/+)pairs, A(CP)(B-s(0) -> K pi) = 0.27 +/- 0.08(stat) +/- 0.02(syst), with a significance of 3.3 sigma. Furthermore, we report the most precise measurement of CP violation in the decays of B-0 mesons to K-+/-pi(-/+) pairs, A(CP)(B-0 -> K pi) = -0.088 +/- 0.011(stat) +/- 0.008(syst), with a significance exceeding 6 sigma.

Official source

https://infoscience.epfl.ch/entities/publication/42aa5798-d963-43a6-9294-06c46c0554d5

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First Evidence of Direct CP Violation in Charmless Two-Body Decays of B-s(0) Mesons

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