Direct CP violation in charm and flavor mixing beyond the SM

Details Direct CP violation in charm and flavor mixing beyond the SM Direct CP violation in charm and flavor mixing beyond the SM

2012-01-30

arxiv.org/abs/1201.6204v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 6 figures

Scientific paper

We analyze possible interpretations of the recent LHCb evidence for CP violation in D meson decays in terms of physics beyond the Standard Model. On general grounds, models in which the primary source of flavor violation is linked to the breaking of chiral symmetry (left-right flavor mixing) are natural candidates to explain this effect, via enhanced chromomagnetic operators. In the case of supersymmetric models, we identify two motivated scenarios: disoriented A-terms and split families. These structures predict other non-standard signals, such as nuclear EDMs close to their present bounds and, possibly, tiny but visible deviations in K and B physics, or even sizable flavor-violating processes involving the top quark or the stops. Some of these connections, especially the one with nuclear EDMs, hold beyond supersymmetry, as illustrated with the help of prototype non-supersymmetric models.

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