%0 Journal Article %1 Crivellin2012Explaining %A Crivellin, Andreas %A Greub, Christoph %A Kokulu, Ahmet %D 2012 %K bdecay %T Explaining B->D\tau\nu, B->D*\tauand B->\tauin a 2HDM of type III %U http://arxiv.org/abs/1206.2634 %X Recently, the BaBar collaboration reported first evidence for new physics in B->D\tauand B->D*\tau\nu. Combining both processes the significance is 3.4\sigma. This result cannot be explained in a two Higgs doublet model of type II. Furthermore, the CKMfitter group finds a 2.9discrepancy between the Standard Model prediction for BrB->\tau\nu (using Vub 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 SM in B meson decays to taus. We show that in a two Higgs doublet model of type III it is possible to simultaneously explain and using a single free parameter \epsilon^u\_32. Also BrB->\tau\nu can be brought into agreement with experiment using \epsilon^u\_31. Furthermore, for Higgs (A^0, H^0, H^+) masses around 500 GeV, as suggested by recent CMS results, all bounds from FCNC processes are satisfied and B->D\tau\nu, B->D*\tauand B->\taucan be explained without a significant degree of fine-tuning.

@article{Crivellin2012Explaining, abstract = {{Recently, the BaBar collaboration reported first evidence for new physics in B-\>D\tau\nu and B-\>D*\tau\nu. Combining both processes the significance is 3.4\sigma. This result cannot be explained in a two Higgs doublet model of type II. Furthermore, the CKMfitter group finds a 2.9\sigma discrepancy between the Standard Model prediction for Br[B-\>\tau\nu] (using Vub 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 SM in B meson decays to taus. We show that in a two Higgs doublet model of type III it is possible to simultaneously explain \bdtau and \bdstau using a single free parameter \epsilon^u\_32. Also Br[B-\>\tau\nu] can be brought into agreement with experiment using \epsilon^u\_31. Furthermore, for Higgs (A^0, H^0, H^+) masses around 500 GeV, as suggested by recent CMS results, all bounds from FCNC processes are satisfied and B-\>D\tau\nu, B-\>D*\tau\nu and B-\>\tau\nu can be explained without a significant degree of fine-tuning.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Crivellin, Andreas and Greub, Christoph and Kokulu, Ahmet}, biburl = {https://www.bibsonomy.org/bibtex/231541a20b313260a351402ad9174b33c/cmcneile}, citeulike-article-id = {10786173}, citeulike-linkout-0 = {http://arxiv.org/abs/1206.2634}, citeulike-linkout-1 = {http://arxiv.org/pdf/1206.2634}, day = 12, eprint = {1206.2634}, interhash = {be7451b5f5fad1de18b80f23b0b8b7d0}, intrahash = {31541a20b313260a351402ad9174b33c}, keywords = {bdecay}, month = jun, posted-at = {2012-06-13 08:47:04}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{Explaining B-\>D\tau\nu, B-\>D*\tau\nu and B-\>\tau\nu in a 2HDM of type III}}, url = {http://arxiv.org/abs/1206.2634}, year = 2012 }