Systematizing the effective theory of self-interacting dark matter
Abstract
If dark matter has strong self-interactions, future astrophysical and cosmological observations, together with a clearer understanding of baryonic feedback effects, might be used to extract the velocity dependence of the dark matter scattering rate. To interpret such data, we should understand what predictions for this quantity are made by various models of the underlying particle nature of dark matter. In this paper, we systematically compute this function for fermionic dark matter with light bosonic mediators of vector, scalar, axial vector, and pseudoscalar type. We do this by matching to the nonrelativistic effective theory of self-interacting dark matter and then computing the spin-averaged viscosity cross section nonperturbatively by solving the Schrödinger equation, thus accounting for any possible Sommerfeld enhancement of the low-velocity cross section. In the pseudoscalar case, this requires a coupled-channel analysis of different angular momentum modes. We find, contrary to some earlier analyses, that nonrelativistic effects only provide a significant enhancement for the cases of light scalar and vector mediators. Scattering from light pseudoscalar and axial vector mediators is well described by tree-level quantum field theory.
- Publication Date:
- Research Org.:
- Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF); Moore Foundation; National Aeronautics and Space administration (NASA); German Research Foundation (DFG)
- OSTI Identifier:
- 1851827
- Grant/Contract Number:
- SC0013607; PHY-1620806; PHY-1915071; 8342; DGE1745303; NNX16AI12G; PHY05-051164; EXC-2094-390783311; PHY-1607611
- 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: 2020; Journal Issue: 10; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; beyond standard model; cosmology of theories beyond the SM
Citation Formats
Agrawal, Prateek, Parikh, Aditya, and Reece, Matthew. Systematizing the effective theory of self-interacting dark matter. United States: N. p., 2020.
Web. doi:10.1007/jhep10(2020)191.
Agrawal, Prateek, Parikh, Aditya, & Reece, Matthew. Systematizing the effective theory of self-interacting dark matter. United States. https://doi.org/10.1007/jhep10(2020)191
Agrawal, Prateek, Parikh, Aditya, and Reece, Matthew. Wed .
"Systematizing the effective theory of self-interacting dark matter". United States. https://doi.org/10.1007/jhep10(2020)191. https://www.osti.gov/servlets/purl/1851827.
@article{osti_1851827,
title = {Systematizing the effective theory of self-interacting dark matter},
author = {Agrawal, Prateek and Parikh, Aditya and Reece, Matthew},
abstractNote = {If dark matter has strong self-interactions, future astrophysical and cosmological observations, together with a clearer understanding of baryonic feedback effects, might be used to extract the velocity dependence of the dark matter scattering rate. To interpret such data, we should understand what predictions for this quantity are made by various models of the underlying particle nature of dark matter. In this paper, we systematically compute this function for fermionic dark matter with light bosonic mediators of vector, scalar, axial vector, and pseudoscalar type. We do this by matching to the nonrelativistic effective theory of self-interacting dark matter and then computing the spin-averaged viscosity cross section nonperturbatively by solving the Schrödinger equation, thus accounting for any possible Sommerfeld enhancement of the low-velocity cross section. In the pseudoscalar case, this requires a coupled-channel analysis of different angular momentum modes. We find, contrary to some earlier analyses, that nonrelativistic effects only provide a significant enhancement for the cases of light scalar and vector mediators. Scattering from light pseudoscalar and axial vector mediators is well described by tree-level quantum field theory.},
doi = {10.1007/jhep10(2020)191},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2020,
place = {United States},
year = {Wed Oct 28 00:00:00 EDT 2020},
month = {Wed Oct 28 00:00:00 EDT 2020}
}
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