QCD-based estimate of direct $CP$ asymmetry in charm decays

Abstract

I discuss the calculation of the direct CP-asymmetry in $D\to {\pi }^{+}{\pi }^{-}$ and $D\to K^{+}{K}^{-}$ decays with the method of QCD light-cone sum rules. The main result is the upper limit for the difference of the two asymmetries $\left|\Delta a_{CP}^{dir}\right|<0.020\pm 0.003\%$ which is significantly smaller than the recent measurement of this quantity by the LHCb collaboration

Contribution to the Proceedings of 10th International Workshop on Charm Physics (CHARM2020)

References in corpus (4)

• Observation of $CP$ violation in charm decays
• Direct CP asymmetry in $D\to {\pi }^{-}{\pi }^{+}$ and $D\to K^{-}{K}^{+}$ in QCD-based approach
• Enhancement of charm CP violation due to nearby resonances
• Resonance enhancement of Charm CP