Multi-Higgs models. Perspectives for identification of wide set of models in future experiments at colliders in the SM-like situation

TL;DR

This paper evaluates the prospects of identifying a broad class of non-minimal Higgs models, including 2HDM, at current and future colliders, emphasizing the challenges in discovering additional Higgs bosons.

Contribution

It provides an analysis of the detection potential for non-minimal Higgs models at colliders, highlighting the difficulties and possible strategies for observing new Higgs particles.

Findings

Discovering neutral Higgs bosons at LHC is very challenging.

Charged Higgs production offers a more promising detection channel.

Detection likelihood depends on specific model parameters.

Abstract

Higgs mechanism of EWSB can be realized in both well known minimal model and with more complex non-minimal Higgs models. These non-minimal models contain new Higgs bosons -- neutral $h_a$ and charged $H_b^\pm$. Necessary step in the discovery of such model is observation of these additional Higgses. We discuss the potential of such researches at modern and future colliders in the light of recent LHC results, for wide set of models, including 2HDM as a simplest example. Our conclusion is rather pessimistic. Discovery of new neutral Higgs boson at LHC is a very difficult task. Some windows to find them appear at accidentally favorable parameters of the theory. The regular way in the detection of these models is the study of processes with production of charged Higgs bosons (better, at Linear Collider).