First measurement of time-dependent CP violation in B0 → K+K- decays

The LHCb Collaboration

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Abstract

Direct and mixing-induced CP-violating asymmetries in B0 s → K+K- decays are measured for the first time using a data sample of pp collisions, corresponding to an integrated luminosity of 1.0 fb-1, collected with the LHCb detector at a centre-of-mass energy of 7TeV. The results are CKK = 0.14 ± 0.11 ± 0.03 and SKK = 0.30 ± 0.12 ± 0.04, where the first uncertainties are statistical and the second systematic. The corresponding quantities are also determined for B0→π +π- decays to be Cππ = -0.38±0.15±0.02 and Sππ = -0.71±0. 13±0.02, in good agreement with existing measurements.

Original languageEnglish
Article number183
Number of pages26
JournalJournal of High Energy Physics
Volume2013
Issue number10
DOIs
Publication statusPublished - Oct 2013
Externally publishedYes

Keywords

  • B physics
  • CKM angle gamma
  • CP violation
  • Flavor physics
  • Hadron-Hadron Scattering

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