Evidence for CP Violation in Time- Integrated D-0 → h(-)h(+) Decay Rates

R Aaij, J.F.J. van den Brand, F. Dettori, T.J. Ketel, R. Koopman, R.W. Lambert, M.H.M. Merk, H.G. Raven, M. Schiller, Collaboration LHCb

Research output: Contribution to JournalArticleAcademicpeer-review

87 Downloads (Pure)


A search for time-integrated CP violation in D0 → h-h+ (h = K, π) decays is presented using 0.62 fb-1 of data collected by LHCb in 2011. The flavor of the charm meson is determined by the charge of the slow pion in the D∗+ → D0π+ and D∗- → D¯0π- decay chains. The difference in CP asymmetry between D0 → K-K+ and D0 → π-π+, ΔA<inf>CP</inf> ≈ A<inf>CP</inf>(K-K+)-A<inf>CP</inf>(π-π+), is measured to be [-0.82 ± 0.21(stat) ± 0.11(syst)]%. This differs from the hypothesis of CP conservation by 3.5 standard deviations. © 2012 CERN, for the LHCb Collaboration. Published by the American Physical Society 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 articles title, journal citation, and DOI.
Original languageEnglish
Article number111602
JournalPhysical Review Letters
Issue number11
Publication statusPublished - 2012


Dive into the research topics of 'Evidence for CP Violation in Time- Integrated D-0 → h(-)h(+) Decay Rates'. Together they form a unique fingerprint.

Cite this