Is a Miracle-less WIMP Ruled out?

Arakawa, Jason; Tait, Tim M. P.

doi:10.21468/SciPostPhys.11.2.019

SciPost Physics

Is a Miracle-less WIMP Ruled out?

Jason Arakawa, Tim M. P. Tait

SciPost Phys. 11, 019 (2021) · published 3 August 2021

doi: 10.21468/SciPostPhys.11.2.019
pdf
Submissions/Reports

Abstract

We examine a real electroweak triplet scalar field as dark matter, abandoning the requirement that its relic abundance is determined through freeze out in a standard cosmological history (a situation which we refer to as a 'miracle-less WIMP'). We extract the bounds on such a particle from collider searches, searches for direct scattering with terrestrial targets, and searches for the indirect products of annihilation. Each type of search provides complementary information, and each is most effective in a different region of parameter space. LHC searches tend to be highly dependent on the mass of the SU(2) charged partner state, and are effective for very large or very tiny mass splitting between it and the neutral dark matter component. Direct searches are very effective at bounding the Higgs portal coupling, but ineffective once it falls below $\lambda_{\text{eff}} \lesssim 10^{-3}$. Indirect searches suffer from large astrophysical uncertainties due to the backgrounds and $J$-factors, but do provide key information for $\sim$ 100 GeV to TeV masses. Synthesizing the allowed parameter space, this example of WIMP dark matter remains viable, but only in miracle-less regimes.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.11.2.019
TI  - Is a Miracle-less WIMP Ruled out?
PY  - 2021/08/03
UR  - https://scipost.org/SciPostPhys.11.2.019
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 11
IS  - 2
SP  - 019
A1  - Arakawa, Jason
AU  - Tait, Tim M. P.
AB  - We examine a real electroweak triplet scalar field as dark matter, abandoning the requirement that its relic abundance is determined through freeze out in a standard cosmological history (a situation which we refer to as a 'miracle-less WIMP'). We extract the bounds on such a particle from collider searches, searches for direct scattering with terrestrial targets, and searches for the indirect products of annihilation. Each type of search provides complementary information, and each is most effective in a different region of parameter space. LHC searches tend to be highly dependent on the mass of the SU(2) charged partner state, and are effective for very large or very tiny mass splitting between it and the neutral dark matter component. Direct searches are very effective at bounding the Higgs portal coupling, but ineffective once it falls below $\lambda_{\text{eff}} \lesssim 10^{-3}$. Indirect searches suffer from large astrophysical uncertainties due to the backgrounds and $J$-factors, but do provide key information for $\sim$ 100 GeV to TeV masses. Synthesizing the allowed parameter space, this example of WIMP dark matter remains viable, but only in miracle-less regimes.
ER  -

@Article{10.21468/SciPostPhys.11.2.019,
	title={{Is a Miracle-less WIMP Ruled out?}},
	author={Jason Arakawa and Tim M. P. Tait},
	journal={SciPost Phys.},
	volume={11},
	pages={019},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.11.2.019},
	url={https://scipost.org/10.21468/SciPostPhys.11.2.019},
}

Cited by 5

Authors / Affiliation: mappings to Contributors and Organizations

See all Organizations.

¹ Jason Arakawa,
¹ Tim M. P. Tait

¹ University of California, Irvine [UCI]

Funder for the research work leading to this publication

National Science Foundation [NSF]