Constraining Interactions in Cosmology's Dark Sector

Abstract

We consider the cosmological constraints on theories in which there exists a nontrivial coupling between the dark matter sector and the sector responsible for the acceleration of the universe, in light of the most recent supernovae, large scale structure and cosmic microwave background data. For a variety of models, we show that the strength of the coupling of dark matter to a quintessence field is constrained to be less than 7% of the coupling to gravity. We also show that long range interactions between fermionic dark matter particles mediated by a light scalar with a Yukawa coupling are constrained to be less than 5% of the strength of gravity at a distance scale of 10 Mpc. We show that all of the models we consider are quantum mechanically weakly coupled, and argue that some other models in the literature are ruled out by quantum mechanical strong coupling.

13 pages, 5 figures

References in corpus (16)

• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Large-scale instability in interacting dark energy and dark matter fluids
• Constraining f(R) Gravity as a Scalar Tensor Theory
• String Cosmology: A Review
• Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
• Evidence Of Dark Matter Annihilations In The WMAP Haze
• Predictive Power of Strong Coupling in Theories with Large Distance Modified Gravity
• Adiabatic instability in coupled dark energy-dark matter models
• Neutrino Dark Energy -- Revisiting the Stability Issue
• A New Force in the Dark Sector?
• Microscopic and Macroscopic Behaviors of Palatini Modified Gravity Theories
• Late universe dynamics with scale-independent linear couplings in the dark sector
• The Adiabatic Instability on Cosmology's Dark Side
• Prospects For Detecting Dark Matter With GLAST In Light Of The WMAP Haze
• Moduli Fields as Quintessence and the Chameleon

Cited by in corpus (6)

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• The Growth of Structure in Interacting Dark Energy Models
• A Field Theory Model for Dark Matter and Dark Energy in Interaction
• Cosmological Perturbations in Models of Coupled Dark Energy
• Slow-Roll Inflation in the Presence of a Dark Energy Coupling