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Title: Thermal conduction by dark matter with velocity and momentum-dependent cross-sections

We use the formalism of Gould and Raffelt [1] to compute the dimensionless thermal conduction coefficients for scattering of dark matter particles with standard model nucleons via cross-sections that depend on the relative velocity or momentum exchanged between particles. Motivated by models invoked to reconcile various recent results in direct detection, we explicitly compute the conduction coefficients α and κ for cross-sections that go as v{sub rel}{sup 2}, v{sub rel}{sup 4}, v{sub rel}{sup −2}, q{sup 2}, q{sup 4} and q{sup −2}, where v{sub rel} is the relative DM-nucleus velocity and q is the momentum transferred in the collision. We find that a v{sub rel}{sup −2} dependence can significantly enhance energy transport from the inner solar core to the outer core. The same can true for any q-dependent coupling, if the dark matter mass lies within some specific range for each coupling. This effect can complement direct searches for dark matter; combining these results with state-of-the-art solar simulations should greatly increase sensitivity to certain DM models. It also seems possible that the so-called Solar Abundance Problem could be resolved by enhanced energy transport in the solar core due to such velocity- or momentum-dependent scatterings.
Authors:
 [1] ;  [2]
  1. Instituto de Física Corpuscular (IFIC), CSIC-Universitat de València, Apartado de Correos 22085, E-46071 Valencia (Spain)
  2. Department of Physics, McGill University 3600 Rue University, Montréal, Québec, Canada H3A 2T8 (Canada)
Publication Date:
OSTI Identifier:
22373641
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 04; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ABUNDANCE; COLLISIONS; CROSS SECTIONS; DETECTION; MASS; NONLUMINOUS MATTER; NUCLEI; NUCLEONS; SCATTERING; STANDARD MODEL; THERMAL CONDUCTION; VELOCITY