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First Evidence of Direct CP Violation in Charmless Two-Body Decays of Bs0 Mesons

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 108, 201601 – Published 16 May 2012

Abstract

Using a data sample corresponding to an integrated luminosity of 0.35fb1 collected by LHCb in 2011, we report the first evidence of CP violation in the decays of Bs0 mesons to K±π pairs, ACP(Bs0Kπ)=0.27±0.08(stat)±0.02(syst), with a significance of 3.3σ. Furthermore, we report the most precise measurement of CP violation in the decays of B0 mesons to K±π pairs, ACP(B0Kπ)=0.088±0.011(stat)±0.008(syst), with a significance exceeding 6σ.

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  • Received 29 February 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.201601

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2012 CERN, for the LHCb Collaboration

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Vol. 108, Iss. 20 — 18 May 2012

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