Abstract
If one removes any ad hoc symmetry assumptions, the general two-Higgs-doublet model should have additional Yukawa interactions independent from fermion mass generation, in general involving flavor-changing neutral Higgs couplings. These extra couplings can affect the discovered Higgs boson through fermion loop contributions. We calculate the renormalized coupling at the one-loop level and evaluate the dependence on heavy Higgs boson mass and extra Yukawa coupling . Precision measurements at future colliders can explore the parameter space, and can give stronger bounds on than the current bound from flavor experiments. As a side result, we find that if , where is the exotic Higgs component of , the -induced top loop contribution cancels against bosonic loop contributions, and one may have alignment without decoupling, namely , but exotic scalar bosons could have masses of several hundred GeV.
- Received 13 April 2017
DOI:https://doi.org/10.1103/PhysRevD.96.015033
© 2017 American Physical Society