Direct CP Violation in Charm Decays due to Left-Right Mixing

Abstract

Motivated by the $3.8\sigma$ deviation from no CP violation hypothesis for the CP asymmetry (CPA) difference between $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$, reported recently by LHCb and CDF, we investigate the CP violating effect due to the left-right (LR) mixing in the general LR symmetric model. In particular, in the non-manifest LR model we show that the large CPA difference could be explained, while the constraints from $({\epsilon }^{\prime }/\epsilon {)}_K$ and $D^0$-${\bar{D}}^0$ are satisfied.

11 pages, 3 figures, references added

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• Conclusions from CDF Results on CP Violation in D^0 \to π^+π^-, K^+K^- and Future Tasks
• Supersymmetry phenomenology beyond the MSSM after 5/fb of LHC data
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• Observation of CP violation in $D^0\to K^{-}{\pi }^{+}$ as a smoking gun for New Physics
• B^\pm -> D K^\pm with direct CP violation in charm
• Nonuniversality of indirect CP asymmetries in $D\to \pi \pi ,KK$ decays
• Direct CP violation in $D^{+}\to K^0({\bar{K}}^0){\pi }^{+}$ decays as a probe for new physics
• Study of CP Violation in $D^{\pm }\to K^{\ast }(892{)}^0{\pi }^{\pm }+{\bar{K}}^{\ast }(892{)}^0{\pi }^{\pm }\to K_{S,L}^0{\pi }^0{\pi }^{\pm }$ Decays
• Distinguishing the right-handed up/charm quarks from top quark via discrete symmetries in the standard model extensions