Constraining dark matter-baryon scattering with linear cosmology
Abstract
Here, we derive constraints on elastic scattering between baryons and dark matter using the cosmic microwave background (CMB) data from the Planck satellite and the Lyman- forest data from the Sloan Digital Sky Survey. Elastic scattering provides baryons and dark matter to exchange momentum, affecting the dynamics of linear density perturbations in the early universe. We derive constraints to scattering cross sections of the form , allowing for a wide range of velocity dependencies with . We improve and correct previous estimates where they exist, including velocity-independent cross section as well as dark matter millicharge and electromagnetic dipole moments. Lyman- forest data dominate the constraints for , where the improvement over CMB data alone can be several orders of magnitude. Dark matter-baryon scattering cannot affect the halo mass function on mass scales . Our results imply, model independently, that a baryon in the halo of a galaxy like our own Milky Way does not scatter from dark matter particles during the age of the galaxy.
- Authors:
-
- Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
- Johns Hopkins Univ., Baltimore, MD (United States)
- Publication Date:
- Research Org.:
- Institute for Advanced Study, Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
- OSTI Identifier:
- 1598503
- Grant/Contract Number:
- SC0009988; AST-0807444; PHY-088855425
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 89; 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
Dvorkin, Cora, Blum, Kfir, and Kamionkowski, Marc. Constraining dark matter-baryon scattering with linear cosmology. United States: N. p., 2014.
Web. doi:10.1103/PhysRevD.89.023519.
Dvorkin, Cora, Blum, Kfir, & Kamionkowski, Marc. Constraining dark matter-baryon scattering with linear cosmology. United States. https://doi.org/10.1103/PhysRevD.89.023519
Dvorkin, Cora, Blum, Kfir, and Kamionkowski, Marc. Mon .
"Constraining dark matter-baryon scattering with linear cosmology". United States. https://doi.org/10.1103/PhysRevD.89.023519. https://www.osti.gov/servlets/purl/1598503.
@article{osti_1598503,
title = {Constraining dark matter-baryon scattering with linear cosmology},
author = {Dvorkin, Cora and Blum, Kfir and Kamionkowski, Marc},
abstractNote = {Here, we derive constraints on elastic scattering between baryons and dark matter using the cosmic microwave background (CMB) data from the Planck satellite and the Lyman-α forest data from the Sloan Digital Sky Survey. Elastic scattering provides baryons and dark matter to exchange momentum, affecting the dynamics of linear density perturbations in the early universe. We derive constraints to scattering cross sections of the form σ∝vn, allowing for a wide range of velocity dependencies with -4≤n≤2. We improve and correct previous estimates where they exist, including velocity-independent cross section as well as dark matter millicharge and electromagnetic dipole moments. Lyman-α forest data dominate the constraints for n>-3, where the improvement over CMB data alone can be several orders of magnitude. Dark matter-baryon scattering cannot affect the halo mass function on mass scales M>1012M⊙. Our results imply, model independently, that a baryon in the halo of a galaxy like our own Milky Way does not scatter from dark matter particles during the age of the galaxy.},
doi = {10.1103/PhysRevD.89.023519},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 2,
volume = 89,
place = {United States},
year = {Mon Jan 27 00:00:00 EST 2014},
month = {Mon Jan 27 00:00:00 EST 2014}
}
Web of Science
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