Bs Mixing and Electric Dipole Moments in MFV

Details Bs Mixing and Electric Dipole Moments in MFV Bs Mixing and Electric Dipole Moments in MFV

2010-06-10

arxiv.org/abs/1006.2127v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages; v2: references added

Scientific paper

We analyze the general structure of four-fermion operators capable of introducing CP-violation preferentially in Bs mixing within the framework of Minimal Flavor Violation. The effect requires a minimum of O(Yu^4 Yd^4) Yukawa insertions, and at this order we find a total of six operators with different Lorentz, color, and flavor contractions that lead to enhanced Bs mixing. We then estimate the impact of these operators and of their close relatives on the possible sizes of electric dipole moments (EDMs) of neutrons and heavy atoms. We identify two broad classes of such operators: those that give EDMs in the limit of vanishing CKM angles, and those that require quark mixing for the existence of non-zero EDMs. The natural value for EDMs from the operators in the first category is up to an order of magnitude above the experimental upper bounds, while the second group predicts EDMs well below the current sensitivity level. Finally, we discuss plausible UV-completions for each type of operator.

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