title: CP violation in B{s} mixing from heavy Higgs boson exchange.
abstract: 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}-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{-}→τν and B{s}→μ^{+}μ{-} 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}-B{s} mixing but also in ΔB=1 transitions or in B{d}-B{d} mixing.
authors.affiliation: Theoretical Physics Department, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
authors.forename: Bogdan A
authors.initials: BA
authors.lastname: Dobrescu
authors.forename: Patrick J
authors.initials: PJ
authors.lastname: Fox
authors.forename: Adam
authors.initials: A
authors.lastname: Martin