Radion Portal Freeze-Out Dark-Matter
High Energy Physics - Phenomenology
2025-07-30 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Experiment
High Energy Physics - Theory
Abstract
We show that, in a consistent model of a stabilized extra-dimensional theory, the radion can serve as a natural portal between ordinary matter and WIMP dark matter. With an effective coupling scale of the Kaluza-Klein theory of 20-100 TeV, the radion portal can produce the observed relic abundance through resonant annihilation for dark matter masses up to a TeV. Existing and planned direct dark matter detection experiments cannot constrain this model. However, indirect detection limits exclude dark matter masses between 5 and 80 GeV, where the radion mediator primarily decays into b-quarks.
Cite
@article{arxiv.2507.21218,
title = {Radion Portal Freeze-Out Dark-Matter},
author = {R. Sekhar Chivukula and Joshua A. Gill and Kenn S. Goh and Kirtimaan A. Mohan and George Sanamyan and Dipan Sengupta and Elizabeth H. Simmons and Xing Wang},
journal= {arXiv preprint arXiv:2507.21218},
year = {2025}
}
Comments
5 pages + 5 pages of supplemental material, 4 figures