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Title: First cosmological constraint on the effective theory of dark matter-proton interactions

Journal Article · · Physical Review D
 [1];  [2]
  1. Johns Hopkins Univ., Baltimore, MD (United States); Univ. of Hawaii, Honolulu, HI (United States); UH High Energy Physics Group
  2. Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences; Univ. of Florida, Gainesville, FL (United States); Princeton Univ., NJ (United States). Dept. of Physics
+ Show Author Affiliations

We obtain here the first cosmological constraints on interactions between dark matter and protons within the formalism of nonrelativistic effective field theory developed for direct detection. For each interaction operator in the effective theory, parameterized by different powers of the relative velocity of the incoming particles, we use the Planck 2015 cosmic microwave background (CMB) temperature, polarization, and lensing anisotropy to set upper limits on the scattering cross section for all dark matter masses above 15 keV. We postulate that for interactions associated with a stronger dependence on velocity, dark matter and baryons stay thermally coupled for longer, but the interaction strengths are suppressed at the low temperatures relevant for Planck observations and are thus less constrained. At the same time, cross sections with stronger velocity dependencies are more constrained in the limit of small dark matter mass. In all cases, the effect of dark matter–proton scattering is most prominent on small scales in the CMB power spectra and in the matter power spectrum, and we thus expect substantial improvement over the current limits with data from ground-based CMB experiments and galaxy surveys.

Research Organization:
Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
SC0010504
OSTI ID:
1598562
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 8 Vol. 98; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (15)

The Simons Observatory: science goals and forecasts journal February 2019
Not as big as a barn: Upper bounds on dark matter-nucleus cross sections journal September 2019
Direct detection of sub-GeV dark matter using a superfluid He 4 target journal November 2019
Strong new limits on light dark matter from neutrino experiments journal November 2019
Critical assessment of CMB limits on dark matter-baryon scattering: New treatment of the relative bulk velocity journal December 2018
Disentangling dark physics with cosmic microwave background experiments journal December 2018
Reverse direct detection: Cosmic ray scattering with light dark matter journal March 2019
Making dark matter out of light: Freeze-in from plasma effects journal June 2019
Dark Matter Interactions, Helium, and the Cosmic Microwave Background journal January 2019
The Simons Observatory: Science goals and forecasts text January 2019
Constraints on Dark Matter Microphysics from the Milky Way Satellite Population journal June 2019
The Simons Observatory: Science goals and forecasts text January 2018
Making dark matter out of light: freeze-in from plasma effects text January 2019
Constraints on Dark Matter Microphysics from the Milky Way Satellite Population text January 2019
(Not as) Big as a Barn: Upper Bounds on Dark Matter-Nucleus Cross Sections text January 2019

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