First Observation of CP Violation in the Decays of B-s(0) Mesons

LHCb collaboration

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102 Citations (Web of Science)

Abstract

Using pp collision data corresponding to an integrated luminosity of 1.0 fb(-1) and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B-s(0) -> K-pi(+) decays, A(CP) (B-s(0) -> K-pi(+)) = 0.27 +/- 0.04(stat) +/- 0.01(syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B-s(0) mesons. Furthermore, we provide an improved determination of direct CP violation in B-0 -> K+pi(-) decays, A(CP)(B-0 -> K+pi(-) ) = -0.080 +/- 0.007(stat) +/- 0.003(syst), which is the most precise measurement of this quantity to date.
Original languageEnglish
Article number221601
Number of pages9
JournalPhysical Review Letters
Volume110
Issue number22
DOIs
Publication statusPublished - 30 May 2013
Externally publishedYes

Keywords

  • ASYMMETRY
  • BARYOGENESIS
  • PROGRESS
  • SEARCH
  • GAMMA

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