Two Higgs doublet models at future colliders

TL;DR

This paper reviews the Two Higgs Doublet Model (THDM), focusing on its phenomenology, experimental constraints, and future collider prospects, especially for the Type-X variant and $ aneta$ determination.

Contribution

It provides a comprehensive summary of current bounds, collider phenomenology, and recent progress in parameter determination for THDMs, emphasizing the Type-X model.

Findings

Current experimental bounds on THDM parameters

Distinct collider signatures of Type-X THDM

Progress in determining $ aneta$ at future colliders

Abstract

The two Higgs doublet model (THDM) is a simple extension of the standard model, which can provide a low energy effective description of more fundamental theories. The model contains additional Higgs bosons, and predicts rich phenomenology especially due to the variation of Yukawa interactions. Under imposing a softly broken discrete symmetry, there are four independent types of Yukawa interactions in THDMs. In this review, we briefly summarize bounds from current experimental data on THDMs and implications at future collider experiments. We pay special attention to the collider phenomenology of the Type-X (lepton specific) THDM, and also discuss recent progress for $\tan\beta$ determination in THDMs.