Direct CP violation in non-leptonic charm decays: Implications for new physics
arXiv:1302.3742
Abstract
I review the implications of recent measurements of CP violation in D meson decays in the context of standard model extensions. Using effective theory methods, one can derive significant constraints on the possible non-standard contributions from measurements of neutral D meson mixing and direct CP violation in kaon decays. Due to an approximate universality of CP violation in new physics scenarios which only break the SU(3)_Q flavor symmetry of the standard model kinetic Lagrangian, such contributions are particularly constrained by epsilon'/epsilon. Explanations of the observed effect within several explicit well-motivated new physics frameworks are briefly discussed. Finally, possible future experimental tests able to distinguish standard vs. non-standard explanations of the observed CP violation in the charm sector are mentioned.
Proceedings of CKM 2012, the 7th International Workshop on the CKM Unitarity Triangle, University of Cincinnati, USA, 28 September - 2 October 2012