Explaining B→Dτν, B→D*τν and B→τν in a two Higgs doublet model of type III

Recently, the BABAR Collaboration reported the first evidence for new physics in B→Dτν and B→D^*τν. Combining both processes, the significance is 3.4σ. This result cannot be explained in a two Higgs doublet model of type II. Furthermore, the CKMfitter Group finds a 2.9σ discrepancy between the Standard Model prediction for Br[B→τν] (using V_ub from a global fit to the unitary triangle) and the measurements of the B factories. Altogether, these measurements are strong indications for physics beyond the Standard Model in B-meson decays to taus. We show that in a two Higgs doublet model of type III it is possible to simultaneously explain B→Dτν and B→D^*τν using a single free parameter ɛ₃₂^u. Also, Br[B→τν] can be brought into agreement with experiment using ɛ₃₁^u. Furthermore, for Higgs (A⁰, H⁰, H^±) masses around 500 GeV, as preferred by recent CMS results, all bounds from flavor changing neutral current processes are satisfied and B→Dτν, B→D^*τν and B→τν can be explained without a significant degree of fine tuning.