Indirect bounds on heavy scalar masses of the two-Higgs-doublet model in light of recent Higgs boson searches

TL;DR

This paper derives upper bounds on the masses of extra scalar bosons in the two-Higgs-doublet model, considering recent Higgs search results and theoretical constraints, indicating these scalars are likely below about 2 TeV.

Contribution

It provides new indirect bounds on heavy scalar masses in the two-Higgs-doublet model based on recent experimental and theoretical constraints.

Findings

Upper bound of about 2 TeV for scalar masses with a 240 GeV Higgs

Upper bound of about 2 TeV for scalar masses with a 500 GeV Higgs

Constraints depend on the Higgs boson mass and electroweak data

Abstract

We study an upper bound on masses of additional scalar bosons from the electroweak precision data and theoretical constraints such as perturbative unitarity and vacuum stability in the two Higgs doublet model taking account of recent Higgs boson search results. If the mass of the Standard-Model-like Higgs boson is rather heavy and is outside the allowed region by the electroweak precision data, such a discrepancy should be compensated by contributions from the additional scalar bosons. We show the upper bound on masses of the additional scalar bosons to be about 2 $(1)$ TeV for the mass of the Standard-Model-like Higgs boson to be 240 $(500)$ GeV.