A radiatively improved fermiophobic Higgs boson scenario

TL;DR

This paper investigates a radiatively stabilized fermiophobic Higgs model, emphasizing the importance of future collider measurements to constrain high-energy parameters and improve understanding of Higgs sector stability.

Contribution

It introduces a renormalization group approach to analyze radiative corrections in fermiophobic Higgs scenarios and highlights the necessity of linear collider data for precise parameter determination.

Findings

Radiative corrections destabilize naive fermiophobic models.

Future linear colliders are essential for measuring Yukawa couplings.

Constraints on the high-energy scale $\\Lambda$ can be derived from collider data.

Abstract

The naive fermiophobic scenario is unstable under radiative corrections, due to the chiral-symmetry breaking induced by fermion mass terms. In a recent study, the problem of including the radiative corrections has been tackled via an effective field theory approach. The renormalized Yukawa couplings are assumed to vanish at a high energy scale $\Lambda$, and their values at the electroweak scale are computed via modified Renormalization Group Equations. We show that, in case a fermiophobic Higgs scenario shows up at the LHC, a linear collider program will be needed to accurately measure the radiative Yukawa structure, and consequently constrain the $\Lambda$ scale.