Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF

Abstract

We report a measurement of the difference (Delta Acp) between time-integrated CP--violating asymmetries in D0-> K+ K- and D0-> pi+pi- decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb-1 of integrated luminosity. The strong decay D*+->D0 pi+ is used to identify the charm meson at production as D0 or anti-D0. We measure Delta Acp = [-0.62 +- 0.21 (stat) +- 0.10 (syst)] %, which differs from zero by 2.7 Gaussian standard deviations.This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions.

Phys. Rev. Lett. 109, 111801 (2012)

References in corpus (4)

• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Charm Meson Decays
• Track Extrapolation and Distribution for the CDF-II Trigger System
• Status of Charm Flavor Physics

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• Model-independent $D^0-\overline{D^0}$ mixing and CP violation studies with $D^0\to K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}$ and $D^0\to K_{\mathrm{S}}^0{K}^{+}{K}^{-}$
• CP violation effects on the measurement of $\gamma$ from $B\to DK$
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• Shift in weak phase $\gamma$ due to CP asymmetries in $D$ decays to two pseudoscalar mesons
• Measurement of CP Violation in $D^0/{\bar{D}}^0$