Probing Mis-Aligned Type-I Two-Higgs-Doublet Model in e+e- → ZH at Future Lepton Colliders
Abstract
A detailed collider study of Higgs production in the process e+e- → ZH is presented within the framework of the Two-Higgs-Doublet Model (2HDM), with particular emphasis on mis-aligned scenarios in the Type-I realization. The analysis is performed at a future e+e- collider with √s=500~GeV and an integrated luminosity of 10 ab−1, considering heavy Higgs masses in the range 160 ≤ mH ≤ 400~GeV. The analysis covers heavy CP-even Higgs states with non-fermionic decay modes such as H→ WW and H→ hh, and incorporates final states arising from leptonic and invisible Z boson decays. Fast parametrized detector-level simulations are employed to evaluate selection efficiencies, signal--background discrimination, and exclusion sensitivities. It is shown that values of |cβ−α|>0.1 can be excluded at the 95% confidence level over almost the entire range 1≤tanβ≤10 in the H→ WW scenario, while the H→ hh channel provides lower sensitivity.
Versions
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BibTeX
@misc{hashemi2026probing,
title = {{Probing Mis-Aligned Type-I Two-Higgs-Doublet Model in $e^+e^- \to ZH$ at Future Lepton Colliders}},
author = {Majid Hashemi},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.22876},
eprint = {2609.22876},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.22876},
}
RIS
TY - UNPB
TI - Probing Mis-Aligned Type-I Two-Higgs-Doublet Model in e^+e^- → ZH at Future Lepton Colliders
AU - Majid Hashemi
PY - 2026
DA - 2026/09/19
PB - arXiv
DO - 10.48550/arxiv.2609.22876
UR - https://arxiv.org/abs/2609.22876
AB - A detailed collider study of Higgs production in the process e^+e^- → ZH is presented within the framework of the Two-Higgs-Doublet Model (2HDM), with particular emphasis on mis-aligned scenarios in the Type-I realization. The analysis is performed at a future e^+e^- collider with √s=500~GeV and an integrated luminosity of 10 ab^−1, considering heavy Higgs masses in the range 160 ≤ m_H ≤ 400~GeV. The analysis covers heavy CP-even Higgs states with non-fermionic decay modes such as H→ WW and H→ hh, and incorporates final states arising from leptonic and invisible Z boson decays. Fast parametrized detector-level simulations are employed to evaluate selection efficiencies, signal--background discrimination, and exclusion sensitivities. It is shown that values of |c_β−α|>0.1 can be excluded at the 95% confidence level over almost the entire range 1≤tanβ≤10 in the H→ WW scenario, while the H→ hh channel provides lower sensitivity.
ER -