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Title: Thermal and non-thermal production of dark matter via Z'-portal(s)

We study the genesis of dark matter in the primordial Universe for representative classes of Z'-portals models. For weak-scale Z' mediators we compute the range of values of the kinetic mixing allowed by WMAP/PLANCK experiments corresponding to a FIMP regime. We show that very small values of δ (10{sup −12}∼<δ∼<10{sup −11}) are sufficient to produce the right amount of dark matter. We also analyse the case of very massive gauge mediators, whose mass m{sub Z'} is larger than the reheating temperature, T{sub RH}, with a weak-scale coupling g{sub D} to ordinary matter. Relic abundance constraints then impose a direct correlation between T{sub RH} and the effective scale Λ of the interactions: Λ ∼ 10{sup 3}−10{sup 5} × T{sub RH}. Finally we describe in some detail the process of dark thermalisation and study its consequences on the computation of the relic abundance.
Authors:
 [1] ; ;  [2] ;  [3]
  1. Service de Physique Théorique Université Libre de Bruxelles, Brussels, 1050 (Belgium)
  2. Laboratoire de Physique Théorique Université Paris-Sud, Orsay, F-91405 (France)
  3. Instituto de Fisica Teorica, IFT-UAM/CSIC, Madrid, 28049 (Spain)
Publication Date:
OSTI Identifier:
22369802
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABUNDANCE; CALCULATION METHODS; CORRELATIONS; COUPLING; LIMITING VALUES; MASS; NONLUMINOUS MATTER; UNIVERSE