On theories of enhanced CP violation in B_s,d meson mixing

Details On theories of enhanced CP violation in B_s,d meson mixing On theories of enhanced CP violation in B_s,d meson mixing

2010-09-15

arxiv.org/abs/1009.2813v3

JHEP 1011:157,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 7 figures, v3 final JHEP version

Scientific paper

10.1007/JHEP11(2010)157

The DO collaboration has measured a deviation from the standard model (SM) prediction in the like sign dimuon asymmetry in semileptonic b decay with a significance of 3.2 sigma. We discuss how minimal flavour violating (MFV) models with multiple scalar representations can lead to this deviation through tree level exchanges of new MFV scalars. We review how the two scalar doublet model can accommodate this result and discuss some of its phenomenology. Limits on electric dipole moments suggest that in this model the coupling of the charged scalar to the right handed u-type quarks is suppressed while its coupling to the d-type right handed quarks must be enhanced. We construct an extension of the MFV two scalar doublet model where this occurs naturally.

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