Evidence for CP violation in time-integrated D0->h-h+ decay rates
LHCb Collaboration (Including: Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, M. M., Silva Coutinho, R., Whitehead, M. (Mark) and Williams, M. P.). (2012) Evidence for CP violation in time-integrated D0->h-h+ decay rates. Physical Review Letters, Vol.108 (No.11). p. 111602. ISSN 0031-9007
WRAP_Back_Evidence_CP_violation.pdf - Published Version
Available under License Creative Commons Attribution.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.108.111602
A search for time-integrated CP violation in D0→h -h + (h=K, π) decays is presented using 0.62fb -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 CPA CP(K -K +)-A CP(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.
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