Evidence for CP violation in time-integrated D0->h-h+ decay rates
Back, J. J., Dossett, D., Gershon, T. J., Harrison, P. F., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew 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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