Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.02432 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- We analyse light Higgs scalar and pseudoscalar associated hadro-production in the 2-Higgs Doublet Model (2HDM) Type-X (or lepton-specific) within the parameter space allowed by theoretical self-consistency requirements as well as the latest experimental constraints from the Large Hadron Collider (LHC), precision data and $B$ physics. Over the viable regions of such a scenario, the Standard Model-like Higgs boson discovered at the LHC in 2012 is the heavier CP-even state $H$. Furthermore, in the Type-X scenario, due to large $\tanβ$, the lighter Higgs scalar $h$ and the pseudoscalar $A$ mainly decay into two $τ$ leptons. Therefore, we concentrate on analysing the signal process $pp\to Z^{*} \to hA\to τ^{+}τ^{-}τ^{+}τ^{-}\to \ell ν_\ell \ell ν_\ell τ_h τ_h$ (where $\ell= e, μ$ whereas $τ_h$ represents the hadronic decay of the $τ$) and explore the feasibility of conducting such a search at the LHC with a centre-of-mass energy of $\sqrt{s}~=$ 14 TeV and a luminosity of $L~=~300~fb^{-1}$. To suppress the huge SM background, we confine ourselves to consider the fraction of signal events with two same-sign $τ$ leptons further decaying into same-sign leptons while the other two $τ$ leptons decay hadronically. We find that a combination of kinematical selection and machine learning (ML) analysis will yields significant sensitivity to this process at the end of the LHC Run 3.