Fingerprinting the extended Higgs sector using one-loop corrected Higgs boson couplings and future precision measurements

TL;DR

This paper computes one-loop radiative corrections to Higgs boson couplings in two Higgs doublet models, providing analytic formulas and demonstrating how future collider measurements can determine model parameters.

Contribution

It introduces a consistent on-shell renormalization scheme for Higgs couplings in 2HDMs and offers detailed analytic formulas for these couplings.

Findings

Complete set of analytic formulas for renormalized Higgs couplings

Demonstration of parameter extraction potential at future colliders

Avoidance of gauge dependence in the mixing parameter

Abstract

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 $Z_2$ 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.