Enhanced di-Higgs production from TeV-scale heavy neutral leptons at future lepton colliders

2025/12/18 by Kriewald, Jonathan, Pinsard, Emanuelle, Teixeira, Ana M.
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2512.16734

Abstract

Within the context of heavy neutral lepton extensions of the Standard Model, we consider the rare di-Higgs production mode ℓ⁺ℓ^-→ hh at future high-energy lepton colliders. As a concrete example, we study the impact of a low-scale Inverse Seesaw realisation on the prospects for di-Higgs production. Our results show that the presence of TeV-scale heavy neutral leptons can enhance the cross-section by up to factor 60. We further comment on the interplay with electroweak precision observables, showing that bounds on the di-Higgs production cross-section at future high-energy lepton colliders could serve as complementary probes of low-scale seesaw scenarios.

Citations

• MuCol Milestone Report No. 7: Consolidated Parameters
• The Compact Linear e⁺e^- Collider (CLIC)
• Design Initiative for a 10 TeV pCM Wakefield Collider
• The CLIC project
• The physics case of a 3 TeV muon collider stage
• Predictions for Z --> mu tau and Related Reactions

Related

• Di-Higgs production at the LHC and beyond
• Discovering Heavy Neutral Leptons with the Higgs Boson
• Di-Higgs Production in SUSY models at the LHC
• Heavy Higgs Scalars at Future Hadron Colliders (A Snowmass Whitepaper)
• Heavy Neutral Leptons without Prejudice