Probing the Inert Scalar Sector of the Inert Doublet Model via Vector-Boson Fusion at a Muon Collider
Abstract
We investigate the sensitivity of a future high-energy muon collider (MuCs) to the inert scalar sector of the Inert Doublet Model (IDM) through a comprehensive set of 2→4 electroweak gauge-boson fusion processes. The scalar spectrum consists of two CP-even neutral scalars: h and H, one CP-odd neutral scalar A, and a pair of charged scalars H±. We assume the neutral scalar H to be the lightest inert state and the dark matter (DM) candidate, while the observed $125$~GeV Higgs boson is identified with the scalar of the Standard Model-like doublet. We consider charged Higgs pair production: μ+μ-→ H+H-νν̅ induced by WW fusion, as well as the associated channels: μ+μ-→ HH±μ∓ν and μ+μ-→ AH±μ∓ν, induced by WZ and Wγ fusion. Owing to their Vector Boson Fusion (VBF) origin, the corresponding cross sections increase significantly with collider energy, making them particularly well suited for exploration at a high-energy MuCs. We first study the 2→ 2 subprocesses WW→ H+ H- and WV→ H+ Si, V=Z, γ and Si=H or A and establish the destructive interference among the contributing diagrams. After imposing theoretical consistency requirements and current experimental constraints, including those from DM and collider searches, we evaluate the corresponding signal rates at √s=3, $10$, and $20$~TeV. We further perform a detector-level Monte Carlo analysis combined with a cut-based signal-background selection. Our results demonstrate that the sensitivity to inert scalar production increases significantly with collision energy, establishing the 10 and 20~TeV MuCs stages as powerful probes of the IDM inert scalar sector.
Related
- Neutrino mass, scalar dark matter, and collider signatures in a radiative doublet-triplet model
- Light Leptoquarks in a Dark Sector: Scalar Dark Matter, Neutrino Mass, and Collider Signatures
- Probing first-generation doublet vector-like leptons via single production at the 3 TeV CLIC
- Prospects for probing neutral vector-like leptons via pair production at a muon collider
- Prospects for probing neutral vector-like leptons via pair production at a muon collider
BibTeX
@misc{arhrib2026probing,
title = {{Probing the Inert Scalar Sector of the Inert Doublet Model via Vector-Boson Fusion at a Muon Collider}},
author = {Abdesslam Arhrib and Es-said Ghourmin and Ayoub Hmissou and Larbi Rahili and Bassim Taki},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.08918},
eprint = {2609.08918},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.08918},
}
RIS
TY - UNPB
TI - Probing the Inert Scalar Sector of the Inert Doublet Model via Vector-Boson Fusion at a Muon Collider
AU - Abdesslam Arhrib
AU - Es-said Ghourmin
AU - Ayoub Hmissou
AU - Larbi Rahili
AU - Bassim Taki
PY - 2026
DA - 2026/09/08
PB - arXiv
DO - 10.48550/arxiv.2609.08918
UR - https://arxiv.org/abs/2609.08918
AB - We investigate the sensitivity of a future high-energy muon collider (MuCs) to the inert scalar sector of the Inert Doublet Model (IDM) through a comprehensive set of 2→4 electroweak gauge-boson fusion processes. The scalar spectrum consists of two CP-even neutral scalars: h and H, one CP-odd neutral scalar A, and a pair of charged scalars H^±. We assume the neutral scalar H to be the lightest inert state and the dark matter (DM) candidate, while the observed $125$~GeV Higgs boson is identified with the scalar of the Standard Model-like doublet. We consider charged Higgs pair production: μ^+μ^-→ H^+H^-νν̅ induced by WW fusion, as well as the associated channels: μ^+μ^-→ HH^±μ^∓ν and μ^+μ^-→ AH^±μ^∓ν, induced by WZ and Wγ fusion. Owing to their Vector Boson Fusion (VBF) origin, the corresponding cross sections increase significantly with collider energy, making them particularly well suited for exploration at a high-energy MuCs. We first study the 2→ 2 subprocesses WW→ H^+ H^- and WV→ H^+ S_i, V=Z, γ and S_i=H or A and establish the destructive interference among the contributing diagrams. After imposing theoretical consistency requirements and current experimental constraints, including those from DM and collider searches, we evaluate the corresponding signal rates at √s=3, $10$, and $20$~TeV. We further perform a detector-level Monte Carlo analysis combined with a cut-based signal-background selection. Our results demonstrate that the sensitivity to inert scalar production increases significantly with collision energy, establishing the 10 and 20~TeV MuCs stages as powerful probes of the IDM inert scalar sector.
ER -