Journal
PHYSICS OF THE DARK UNIVERSE
Volume 12, Issue -, Pages 24-36Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.dark.2016.01.002
Keywords
Dark matter direct detection; Dark matter models; Light dark matter mediators
Categories
Funding
- Munich Institute for Astro- and Particle Physics (MIAPP) of the DFG cluster of excellence Origin and Structure of the Universe
- NSF [PHY-1415548]
- National Science Foundation [PHYS-1066293]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1415548] Funding Source: National Science Foundation
Ask authors/readers for more resources
Many models of dark matter scattering with baryons may be treated either as a simple contact interaction or as the exchange of a light mediator particle. We study an alternative, in which a continuum of light mediator states may be exchanged. This could arise, for instance, from coupling to a sector which is approximately conformal at the relevant momentum transfer scale. In the non-relativistic effective theory of dark matter-baryon scattering, which is useful for parametrizing direct detection signals, the effect of such continuum mediators is to multiply the amplitude by a function of the momentum transfer q, which in the simplest case is just a power law. We develop the basic framework and study two examples: the case where the mediator is a scalar operator coupling to the Higgs portal (which turns out to be highly constrained) and the case of an antisymmetric tensor operator O-mu nu. that mixes with the hypercharge field strength and couples to dark matter tensor currents, which has an interesting viable parameter space. We describe the effect of such mediators on the cross sections and recoil energy spectra that could be observed in direct detection. (C) 2016 The Authors. Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available