CP violation in B_s mixing from heavy Higgs exchange

Details CP violation in B_s mixing from heavy Higgs exchange CP violation in B_s mixing from heavy Higgs exchange

2010-05-23

arxiv.org/abs/1005.4238v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure. v2: Equations (17)-(19) included to clarify the flavor structure of uplifted supersymmetry

Scientific paper

The anomalous dimuon charge asymmetry reported by the D0 Collaboration may be due to the tree-level exchange of some spin-0 particles that mediate CP violation in B_s-\bar{B}_s meson mixing. We show that for a range of couplings and masses, the heavy neutral states in a two Higgs doublet model can generate a large charge asymmetry. This range is natural in "uplifted supersymmetry", and may enhance the B^- -> tau nu and B_s -> mu^+ mu^- decay rates. However, we point out that on general grounds the reported central value of the charge asymmetry requires new physics not only in B_s-\bar{B}_s mixing but also in \Delta B = 1 transitions or in B_d-\bar{B}_d mixing.

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