Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Probing freeze-in via invisible Higgs decay

Lebedev, Oleg ; Morais, António P. ; Oliveira, Vinícius and Pasechnik, Roman LU (2025) 2nd Training School and General Meeting of the COST Action COSMIC WISPers (CA21106), COSMICWISPers 2024 In Proceedings of Science 474.
Abstract

In this work, we explore Higgs boson decays into dark matter (DM) within the context of the freeze-in mechanism under stronger coupling scenarios. Our analysis focuses on scalar DM candidates interacting through the Higgs portal, where the coupling strength can be significant without establishing thermal equilibrium, owing to a suppressed reheating temperature. We find that for DM masses as low as the MeV scale, the observed relic density can be reproduced while remaining consistent with existing collider and cosmological constraints. Notably, the framework predicts invisible Higgs decays at the level of a few percent, providing exciting prospects for experimental verification at the HL-LHC and FCC.

Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of 2nd Training School and General Meeting of the COST Action COSMIC WISPers (CA21106) - PoS(COSMICWISPers2024)
series title
Proceedings of Science
volume
474
conference name
2nd Training School and General Meeting of the COST Action COSMIC WISPers (CA21106), COSMICWISPers 2024
conference location
Istanbul, Turkey
conference dates
2024-09-03 - 2024-09-06
external identifiers
  • scopus:105009009527
ISSN
1824-8039
DOI
10.22323/1.474.0070
language
English
LU publication?
yes
additional info
Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0) All rights for text and data mining, AI training, and similar technologies for commercial purposes, are reserved.
id
65644d90-d449-4335-b775-444431603ba5
date added to LUP
2025-12-16 10:06:28
date last changed
2025-12-16 10:07:35
@inproceedings{65644d90-d449-4335-b775-444431603ba5,
  abstract     = {{<p>In this work, we explore Higgs boson decays into dark matter (DM) within the context of the freeze-in mechanism under stronger coupling scenarios. Our analysis focuses on scalar DM candidates interacting through the Higgs portal, where the coupling strength can be significant without establishing thermal equilibrium, owing to a suppressed reheating temperature. We find that for DM masses as low as the MeV scale, the observed relic density can be reproduced while remaining consistent with existing collider and cosmological constraints. Notably, the framework predicts invisible Higgs decays at the level of a few percent, providing exciting prospects for experimental verification at the HL-LHC and FCC.</p>}},
  author       = {{Lebedev, Oleg and Morais, António P. and Oliveira, Vinícius and Pasechnik, Roman}},
  booktitle    = {{Proceedings of 2nd Training School and General Meeting of the COST Action COSMIC WISPers  (CA21106)  - PoS(COSMICWISPers2024)}},
  issn         = {{1824-8039}},
  language     = {{eng}},
  month        = {{06}},
  series       = {{Proceedings of Science}},
  title        = {{Probing freeze-in via invisible Higgs decay}},
  url          = {{http://dx.doi.org/10.22323/1.474.0070}},
  doi          = {{10.22323/1.474.0070}},
  volume       = {{474}},
  year         = {{2025}},
}