Direct CP violation in D-meson decays
High Energy Physics - Phenomenology
2012-05-31 v1
Abstract
Recently, the LHCb and CDF collaborations reported a surprisingly large difference between the direct CP asymmetries, Delta A_CP, in the D0 -> K+ K- and D0 -> pi+ pi- decay modes. An interesting question is whether this measurement can be explained within the standard model. In this review, I would like to convey two messages: First, large penguin contractions can plausibly account for this measurement and lead to a consistent picture, also explaining the difference between the decay rates of the two modes. Second, "new physics" contributions are by no means excluded; viable models exist and can possibly be tested.
Cite
@article{arxiv.1205.6776,
title = {Direct CP violation in D-meson decays},
author = {Joachim Brod},
journal= {arXiv preprint arXiv:1205.6776},
year = {2012}
}
Comments
4 pages, 1 figure. To appear in the proceedings of the 47th Rencontres de Moriond on QCD and High-Energy Interactions, 2012