209 research outputs found
Radiative corrections to the Yukawa coupling constants in two Higgs doublet models
We calculate one-loop corrected Yukawa coupling constants for the
standard model like Higgs boson in two Higgs doublet models. We focus on
the models with the softly-broken symmetry, which is imposed to avoid the
flavor changing neutral current. Under the symmetry, there are four types
of Yukawa interactions. We find that one-loop contributions from extra Higgs
bosons modify the couplings to be maximally about under the
constraint from perturbative unitarity and vacuum stability. Our results show
that the pattern of tree-level deviations by the mixing effect in each type of
Yukawa couplings from the SM predictions does not change even including
radiative corrections. Moreover, when the gauge couplings () are
found to be slightly (with a percent level) differ from the SM predictions, the
couplings also deviate but more largely. Therefore, in such a case,
not only can we determine the type of Yukawa couplings but also we can obtain
information on the extra Higgs bosons by comparing the predictions with
precisely measured and couplings at future electron-positron
colliders.Comment: Version accepted in Physics Letters
Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements
We calculate radiative corrections to a full set of coupling constants for
the 125 GeV Higgs boson at the one-loop level in two Higgs doublet models with
four types of Yukawa interaction under the softly-broken discrete
symmetry. The renormalization calculations are performed in the on-shell
scheme, in which the gauge dependence in the mixing parameter which appears in
the previous calculation is consistently avoided. We first show the details of
our renormalizaton scheme, and present the complete set of the analytic
formulae of the renormalized couplings. We then numerically demonstrate how the
inner parameters of the model can be extracted by the future precision
measurements of these couplings at the high luminosity LHC and the
International Linear Collider.Comment: Version published in Nuclear Physics
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