Nonleptonic Charm Decays and CP Violation

Abstract

In this talk we briefly present a flavor-SU(3) technique to study branching ratios and direct CP asymmetries $D$-meson decays. The first part of the talk is meant to set up a foundation, based on previous work, to deal with flavor-SU(3) amplitudes and relative strong phases. In addition, we present a model for dealing with SU(3)-breaking in branching ratio measurements of SCS $D^0$ decays. In the second part of the talk we make use of a proposal for an enhanced CP-violating penguin in the SM, to explain the recent LHCb and CDF observations of CP violation in SCS $D^0$ decays. Furthermore, we use our model to predict CP violation in ${\pi }^0{\pi }^0$ and $K^{+}{\bar{K}}^0$ final states. Large experimental bounds on individual CP asymmetries give rise to a large allowed range of $\delta$, the strong phase of the CP-violating penguin. We also briefly discuss future prospects.

16 pages, 5 figures, to appear in the proceedings of The 5th International Workshop on Charm Physics (Charm 2012), 14-17 May 2012, Honolulu, Hawai'i 96822

References in corpus (5)

• Conclusions from CDF Results on CP Violation in D^0 \to π^+π^-, K^+K^- and Future Tasks
• Flavor symmetry and decays of charmed mesons to pairs of light pseudoscalars
• Direct CP Violation in D Decays in view of LHCb and CDF Results
• Relative phases in Dalitz plot amplitudes for $D^0\to K_S{\pi }^{+}{\pi }^{-}$ and $D^0\to {\pi }^0{K}^{+}{K}^{-}$
• Direct CP Violation in D -> hh Decays

Cited by in corpus (2)

• Shift in weak phase $\gamma$ due to CP asymmetries in $D$ decays to two pseudoscalar mesons
• Direct CP Violation in Nonleptonic Charm Decays