From Kination to Detection: Scotogenic Scalar Dark Matter
Abstract
We investigate scalar dark matter in the scotogenic model during an early kination-dominated epoch. The enhanced expansion rate causes earlier freeze-out and increases the relic abundance, opening viable dark matter masses from approximately 200 GeV to 1 TeV while reducing the need for co-annihilation with a nearly degenerate singlet fermion. Current indirect searches strongly constrain the (100−200) GeV region, whereas much of the surviving parameter space can be probed by CTA and next-generation direct detection experiments. The viable spectra also lead to complementary collider signatures, including missing transverse energy, displaced leptons, and disappearing charged tracks, providing promising tests at the HL-LHC and future lepton colliders.
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BibTeX
@misc{chun2026from,
title = {{From Kination to Detection: Scotogenic Scalar Dark Matter}},
author = {Eung Jin Chun and Ranjeet Kumar and Sanjoy Mandal and Abhishek Roy},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.00930},
eprint = {2611.00930},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.00930},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - From Kination to Detection: Scotogenic Scalar Dark Matter
AU - Eung Jin Chun
AU - Ranjeet Kumar
AU - Sanjoy Mandal
AU - Abhishek Roy
PY - 2026
DA - 2026/11/01
PB - arXiv
DO - 10.48550/arxiv.2611.00930
UR - https://arxiv.org/abs/2611.00930
AB - We investigate scalar dark matter in the scotogenic model during an early kination-dominated epoch. The enhanced expansion rate causes earlier freeze-out and increases the relic abundance, opening viable dark matter masses from approximately 200 GeV to 1 TeV while reducing the need for co-annihilation with a nearly degenerate singlet fermion. Current indirect searches strongly constrain the (100−200) GeV region, whereas much of the surviving parameter space can be probed by CTA and next-generation direct detection experiments. The viable spectra also lead to complementary collider signatures, including missing transverse energy, displaced leptons, and disappearing charged tracks, providing promising tests at the HL-LHC and future lepton colliders.
ER -