%0 Generic %1 Crivellin2015Perturbed %A Crivellin, Andreas %A Heeck, Julian %A Stoffer, Peter %D 2015 %K bsm, flavor %T A perturbed lepton-specific two-Higgs-doublet model facing experimental hints for physics beyond the Standard Model %U http://arxiv.org/abs/1507.07567 %X The BaBar, Belle, and LHCb collaborations have reported evidence for new physics in \$BD\tau\nu\$ and \$BD^*\tau\nu\$ of approximately \$3.8\sigma\$. There is also the long lasting discrepancy of about \$3\sigma\$ in the anomalous magnetic moment of the muon, and the branching ratio for \$\tau\to\mu\nu\nu\$ is \$1.8\sigma\$ (\$2.4\sigma\$) above the Standard Model expectation using the HFAG (PDG) values. Furthermore, CMS found hints for a non-zero decay rate of \$h\to\mu\tau\$. Interestingly, all these observations can be explained by introducing new scalars. In this article we consider these processes within a lepton-specific two-Higgs doublet model (i.e. of type X) with additional non-standard Yukawa couplings. It is found that one can accommodate \$\tau\to\mu\nu\nu\$ with modified Higgs--\$\tau\$ couplings. The anomalous magnetic moment of the muon can be explained if the additional neutral CP-even Higgs \$H\$ is light (below 100 GeV). Also \$R(D)\$ and \$R(D^*)\$ can be easily explained by additional \$t\$--\$c\$--Higgs couplings. Combining these \$t\$--\$c\$ couplings with a light \$H\$ the decay rate for \$tH c\$ can be in a testable range for the LHC. Effects in \$h\to\mu\tau\$ are also possible, but in this case a simultaneous explanation of the anomalous magnetic moment of the muon is difficult due to the unavoidable \$\tau\to\mu\gamma\$ decay.

@misc{Crivellin2015Perturbed, abstract = {{The BaBar, Belle, and LHCb collaborations have reported evidence for new physics in \$B\to D\tau\nu\$ and \$B\to D^*\tau\nu\$ of approximately \$3.8\sigma\$. There is also the long lasting discrepancy of about \$3\sigma\$ in the anomalous magnetic moment of the muon, and the branching ratio for \$\tau\to\mu\nu\nu\$ is \$1.8\sigma\$ (\$2.4\sigma\$) above the Standard Model expectation using the HFAG (PDG) values. Furthermore, CMS found hints for a non-zero decay rate of \$h\to\mu\tau\$. Interestingly, all these observations can be explained by introducing new scalars. In this article we consider these processes within a lepton-specific two-Higgs doublet model (i.e. of type X) with additional non-standard Yukawa couplings. It is found that one can accommodate \$\tau\to\mu\nu\nu\$ with modified Higgs--\$\tau\$ couplings. The anomalous magnetic moment of the muon can be explained if the additional neutral CP-even Higgs \$H\$ is light (below 100 GeV). Also \$R(D)\$ and \$R(D^*)\$ can be easily explained by additional \$t\$--\$c\$--Higgs couplings. Combining these \$t\$--\$c\$ couplings with a light \$H\$ the decay rate for \$t\to H c\$ can be in a testable range for the LHC. Effects in \$h\to\mu\tau\$ are also possible, but in this case a simultaneous explanation of the anomalous magnetic moment of the muon is difficult due to the unavoidable \$\tau\to\mu\gamma\$ decay.}}, added-at = {2019-02-23T22:09:48.000+0100}, archiveprefix = {arXiv}, author = {Crivellin, Andreas and Heeck, Julian and Stoffer, Peter}, biburl = {https://www.bibsonomy.org/bibtex/2f6fbba26a70820b21f31d46f539a6686/cmcneile}, citeulike-article-id = {13688226}, citeulike-linkout-0 = {http://arxiv.org/abs/1507.07567}, citeulike-linkout-1 = {http://arxiv.org/pdf/1507.07567}, day = 27, eprint = {1507.07567}, interhash = {bacf9e54e3082f63d57fc0f1055a78da}, intrahash = {f6fbba26a70820b21f31d46f539a6686}, keywords = {bsm, flavor}, month = jul, posted-at = {2015-07-29 09:46:25}, priority = {2}, timestamp = {2019-02-23T22:15:27.000+0100}, title = {{A perturbed lepton-specific two-Higgs-doublet model facing experimental hints for physics beyond the Standard Model}}, url = {http://arxiv.org/abs/1507.07567}, year = 2015 }