Non-Abelian dark matter and dark radiation
Abstract
We propose a new class of dark matter models with unusual phenomenology. What is ordinary about our models is that dark matter particles are WIMPs, they are weakly coupled to the Standard Model and have weak scale masses. What is unusual is that they come in multiplets of a new "dark" non-Abelian gauge group with milliweak coupling. The massless dark gluons of this dark gauge group contribute to the energy density of the universe as a form of weakly self-interacting dark radiation. In this paper we explore the consequences of having i.) dark matter in multiplets ii.) self-interacting dark radiation and iii.) dark matter which is weakly coupled to dark radiation. We find that i.) dark matter cross sections are modified by multiplicity factors which have significant consequences for collider searches and indirect detection, ii.) dark gluons have thermal abundances which affect the CMB as dark radiation. Unlike additional massless neutrino species the dark gluons are interacting and have vanishing viscosity and iii.) the coupling of dark radiation to dark matter represents a new mechanism for damping the large scale structure power spectrum. A combination of additional radiation and slightly damped structure is interesting because it can remove tensions betweenmore »
- Authors:
-
- Boston Univ., MA (United States)
- Publication Date:
- Research Org.:
- Boston Univ., MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1833199
- Alternate Identifier(s):
- OSTI ID: 1202635
- Grant/Contract Number:
- SC0015845; SC0010025; SC-0010025
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 2; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Buen-Abad, Manuel A., Marques-Tavares, Gustavo, and Schmaltz, Martin. Non-Abelian dark matter and dark radiation. United States: N. p., 2015.
Web. doi:10.1103/physrevd.92.023531.
Buen-Abad, Manuel A., Marques-Tavares, Gustavo, & Schmaltz, Martin. Non-Abelian dark matter and dark radiation. United States. https://doi.org/10.1103/physrevd.92.023531
Buen-Abad, Manuel A., Marques-Tavares, Gustavo, and Schmaltz, Martin. Mon .
"Non-Abelian dark matter and dark radiation". United States. https://doi.org/10.1103/physrevd.92.023531. https://www.osti.gov/servlets/purl/1833199.
@article{osti_1833199,
title = {Non-Abelian dark matter and dark radiation},
author = {Buen-Abad, Manuel A. and Marques-Tavares, Gustavo and Schmaltz, Martin},
abstractNote = {We propose a new class of dark matter models with unusual phenomenology. What is ordinary about our models is that dark matter particles are WIMPs, they are weakly coupled to the Standard Model and have weak scale masses. What is unusual is that they come in multiplets of a new "dark" non-Abelian gauge group with milliweak coupling. The massless dark gluons of this dark gauge group contribute to the energy density of the universe as a form of weakly self-interacting dark radiation. In this paper we explore the consequences of having i.) dark matter in multiplets ii.) self-interacting dark radiation and iii.) dark matter which is weakly coupled to dark radiation. We find that i.) dark matter cross sections are modified by multiplicity factors which have significant consequences for collider searches and indirect detection, ii.) dark gluons have thermal abundances which affect the CMB as dark radiation. Unlike additional massless neutrino species the dark gluons are interacting and have vanishing viscosity and iii.) the coupling of dark radiation to dark matter represents a new mechanism for damping the large scale structure power spectrum. A combination of additional radiation and slightly damped structure is interesting because it can remove tensions between global ΛCDM fits from the CMB and direct measurements of the Hubble expansion rate (H0) and large scale structure (σ8).},
doi = {10.1103/physrevd.92.023531},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 2,
volume = 92,
place = {United States},
year = {Mon Jul 27 00:00:00 EDT 2015},
month = {Mon Jul 27 00:00:00 EDT 2015}
}
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