Continuum-mediated self-interacting dark matter
Abstract
Dark matter may self-interact through a continuum of low-mass states. This happens if dark matter couples to a strongly-coupled nearly-conformal hidden sector. This type of theory is holographically described by brane-localized dark matter interacting with bulk fields in a slice of 5D anti-de Sitter space. The long-range potential in this scenario depends on a non-integer power of the spatial separation, in contrast to the Yukawa potential generated by the exchange of a single 4D mediator. The resulting self-interaction cross section scales like a non-integer power of velocity. We identify the Born, classical and resonant regimes and investigate them using state-of-the-art numerical methods. We demonstrate the viability of our continuum-mediated framework to address the astrophysical small-scale structure anomalies. Investigating the continuum-mediated Sommerfeld enhancement, we demonstrate that a pattern of resonances can occur depending on the non-integer power. We conclude that continuum mediators introduce novel power-law scalings which open new possibilities for dark matter self-interaction phenomenology.
- Authors:
-
- Univ. of California, Riverside, CA (United States). Dept. of Physics and Astronomy
- ICTP SAIFR & IFT-UNESP, São Paulo (Brazil)
- Publication Date:
- Research Org.:
- Univ. of California, Riverside, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1851087
- Grant/Contract Number:
- SC0008541; 1066293
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2021; Journal Issue: 6; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; Phenomenology of Field Theories in Higher Dimensions; Strings and branes phenomenology
Citation Formats
Chaffey, Ian, Fichet, Sylvain, and Tanedo, Philip. Continuum-mediated self-interacting dark matter. United States: N. p., 2021.
Web. doi:10.1007/jhep06(2021)008.
Chaffey, Ian, Fichet, Sylvain, & Tanedo, Philip. Continuum-mediated self-interacting dark matter. United States. https://doi.org/10.1007/jhep06(2021)008
Chaffey, Ian, Fichet, Sylvain, and Tanedo, Philip. Tue .
"Continuum-mediated self-interacting dark matter". United States. https://doi.org/10.1007/jhep06(2021)008. https://www.osti.gov/servlets/purl/1851087.
@article{osti_1851087,
title = {Continuum-mediated self-interacting dark matter},
author = {Chaffey, Ian and Fichet, Sylvain and Tanedo, Philip},
abstractNote = {Dark matter may self-interact through a continuum of low-mass states. This happens if dark matter couples to a strongly-coupled nearly-conformal hidden sector. This type of theory is holographically described by brane-localized dark matter interacting with bulk fields in a slice of 5D anti-de Sitter space. The long-range potential in this scenario depends on a non-integer power of the spatial separation, in contrast to the Yukawa potential generated by the exchange of a single 4D mediator. The resulting self-interaction cross section scales like a non-integer power of velocity. We identify the Born, classical and resonant regimes and investigate them using state-of-the-art numerical methods. We demonstrate the viability of our continuum-mediated framework to address the astrophysical small-scale structure anomalies. Investigating the continuum-mediated Sommerfeld enhancement, we demonstrate that a pattern of resonances can occur depending on the non-integer power. We conclude that continuum mediators introduce novel power-law scalings which open new possibilities for dark matter self-interaction phenomenology.},
doi = {10.1007/jhep06(2021)008},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2021,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 2021},
month = {Tue Jun 01 00:00:00 EDT 2021}
}
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