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PreprintCC BY 4.0arXiv

Multi-Higgs production from a theory of varying Higgs quartic and top Yukawa couplings

  • Ulf Danielsson
  • Rikard Enberg
  • Gunnar Ingelman
  • Soumyadip Kundu
  • Tanumoy Mandal
  • Subhadip Mitra
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Abstract

We study the collider phenomenology of a theory in which the Higgs quartic self-coupling and the top Yukawa coupling are \textit{varying couplings}, which arise dynamically from two scalar fields, ϕ1 and ϕ2. Depending on the scalar masses relative to twice the top-quark mass, the heavy scalars decay mainly to Higgs boson pairs (hh) or to top-quark pairs (tt̅), giving two distinct signatures. We find sizeable cross sections for resonant hh production, and also for the background-suppressed process with three Higgs bosons (hhh) from associated production, pp → hϕi → hhh. By recasting ATLAS resonance searches, we set bounds on the effective new-physics scales Λ1 and Λ2 at the TeV scale. We also show that the High-Luminosity LHC (HL-LHC) will probe this parameter space further, through combined measurements of the hh, tt̅ and multi-Higgs channels. This gives a strong, multi-channel test of whether the electroweak sector has a dynamical origin.

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Cite

BibTeXRIS
BibTeX
@misc{danielsson2026multihiggs,
  title = {{Multi-Higgs production from a theory of varying Higgs quartic and top Yukawa couplings}},
  author = {Ulf Danielsson and Rikard Enberg and Gunnar Ingelman and Soumyadip Kundu and Tanumoy Mandal and Subhadip Mitra},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.21751},
  eprint = {2610.21751},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.21751},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Multi-Higgs production from a theory of varying Higgs quartic and top Yukawa couplings
AU  - Ulf Danielsson
AU  - Rikard Enberg
AU  - Gunnar Ingelman
AU  - Soumyadip Kundu
AU  - Tanumoy Mandal
AU  - Subhadip Mitra
PY  - 2026
DA  - 2026/10/15
PB  - arXiv
DO  - 10.48550/arxiv.2610.21751
UR  - https://arxiv.org/abs/2610.21751
AB  - We study the collider phenomenology of a theory in which the Higgs quartic self-coupling and the top Yukawa coupling are \textit{varying couplings}, which arise dynamically from two scalar fields, ϕ_1 and ϕ_2. Depending on the scalar masses relative to twice the top-quark mass, the heavy scalars decay mainly to Higgs boson pairs (hh) or to top-quark pairs (tt̅), giving two distinct signatures. We find sizeable cross sections for resonant hh production, and also for the background-suppressed process with three Higgs bosons (hhh) from associated production, pp → hϕ_i → hhh. By recasting ATLAS resonance searches, we set bounds on the effective new-physics scales Λ_1 and Λ_2 at the TeV scale. We also show that the High-Luminosity LHC (HL-LHC) will probe this parameter space further, through combined measurements of the hh, tt̅ and multi-Higgs channels. This gives a strong, multi-channel test of whether the electroweak sector has a dynamical origin.
ER  -