Resonance catalyzed CP asymmetries in D -> P l+ l-

Abstract

Recently observed increase of direct CP asymmetry in charm meson nonleptonic decays is difficult to explain within the SM. If this effect is induced by new physics, this might be investigated in other charm processes. We propose to investigate new CP violating effects in rare decays $D\to P{\ell }^{+}{\ell }^{-}$, which arise due to the interference of resonant part of the long distance contribution and the new physics affected short distance contribution. Performing a model independent analysis, we identify as appropriate observables the differential direct CP asymmetry and partial decay width CP asymmetry. We find that in the most promising decays $D^{+}\to {\pi }^{+}{\ell }^{+}{\ell }^{-}$ and $D_s^{+}\to K^{+}{\ell }^{+}{\ell }^{-}$ the "peak-symmetric" and "peak-antisymmetric" CP asymmetries are strong phase dependent and can be of the order 1% and 10%, respectively.

9 pages, 4 figures, 2 tables

References in corpus (5)

• Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF
• Measurement of the q2 dependence of the Hadronic Form Factor in D0 --> K- e+ nu_e decays
• Shedding light on CP violation in the charm system via D to V gamma decays
• Updated constraints on new physics in rare charm decays
• Search for rare and forbidden decays of charm and charmed-strange mesons to final states h^+- e^-+ e^+

Cited by in corpus (10)

• Mixing and $CP$ violation in the charm system
• Theoretical and experimental status of rare charm decays
• Decays $D_{(s)}^{+}\to \pi (K{)}^{+}{\ell }^{+}{\ell }^{-}$ and $D^0\to {\ell }^{+}{\ell }^{-}$ in the MSSM with and without R-parity
• Angular analysis of $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ decays and search for $CP$ violation
• Search for $D^0$ meson decays to ${\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and $K^{+}{K}^{-}{e}^{+}{e}^{-}$ final states
• Search for resonance-enhanced $CP$ and angular asymmetries in the ${\Lambda }_c^{+}\to p{\mu }^{+}{\mu }^{-}$ decay at LHCb
• New opportunities for rare charm from $Z\to c\bar{c}$ decays
• 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
• Null test searches for BSM physics with rare charm decays
• Direct CP violation in non-leptonic charm decays: Implications for new physics