First evidence of direct CP violation in charmless two-body decays of Bs mesons

The LHCb Collaboration; Matthew Needham; Franz Muheim; Peter Clarke; Yuehong Xie; Stephan Eisenhardt

doi:10.1103/PhysRevLett.108.201601

First evidence of direct CP violation in charmless two-body decays of Bs mesons

The LHCb Collaboration, Matthew Needham, Franz Muheim, Peter Clarke, Yuehong Xie, Stephan Eisenhardt

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 B0s mesons to K±π∓ pairs, ACP(B0s→Kπ)=0.27±0.08(stat)±0.02(syst), with a significance of 3.3σ. Furthermore, we report the first observation of CP violation in B0 decays at a hadron collider, ACP(B0→Kπ)=−0.088±0.011(stat)±0.008(syst), with a significance exceeding 6σ.

Original language	English
Pages (from-to)	201601
Number of pages	1
Journal	Physical Review Letters
Volume	108
Early online date	28 Feb 2012
DOIs	https://doi.org/10.1103/PhysRevLett.108.201601
Publication status	Published - 16 May 2012

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title = "First evidence of direct CP violation in charmless two-body decays of Bs mesons",

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 B0s mesons to K±π∓ pairs, ACP(B0s→Kπ)=0.27±0.08(stat)±0.02(syst), with a significance of 3.3σ. Furthermore, we report the first observation of CP violation in B0 decays at a hadron collider, ACP(B0→Kπ)=−0.088±0.011(stat)±0.008(syst), with a significance exceeding 6σ.",

author = "Stephen Playfer and {The LHCb Collaboration} and Matthew Needham and Franz Muheim and Peter Clarke and Yuehong Xie and Stephan Eisenhardt",

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doi = "10.1103/PhysRevLett.108.201601",

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T1 - First evidence of direct CP violation in charmless two-body decays of Bs mesons

AU - Playfer, Stephen

AU - The LHCb Collaboration

AU - Needham, Matthew

AU - Muheim, Franz

AU - Clarke, Peter

AU - Xie, Yuehong

AU - Eisenhardt, Stephan

PY - 2012/5/16

Y1 - 2012/5/16

N2 - 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 B0s mesons to K±π∓ pairs, ACP(B0s→Kπ)=0.27±0.08(stat)±0.02(syst), with a significance of 3.3σ. Furthermore, we report the first observation of CP violation in B0 decays at a hadron collider, ACP(B0→Kπ)=−0.088±0.011(stat)±0.008(syst), with a significance exceeding 6σ.

AB - 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 B0s mesons to K±π∓ pairs, ACP(B0s→Kπ)=0.27±0.08(stat)±0.02(syst), with a significance of 3.3σ. Furthermore, we report the first observation of CP violation in B0 decays at a hadron collider, ACP(B0→Kπ)=−0.088±0.011(stat)±0.008(syst), with a significance exceeding 6σ.

U2 - 10.1103/PhysRevLett.108.201601

DO - 10.1103/PhysRevLett.108.201601

M3 - Article

VL - 108

SP - 201601

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -