Thermal and non-thermal production of dark matter via Z'-portal(s)
- Service de Physique Théorique Université Libre de Bruxelles, Brussels, 1050 (Belgium)
- Laboratoire de Physique Théorique Université Paris-Sud, Orsay, F-91405 (France)
- Instituto de Fisica Teorica, IFT-UAM/CSIC, Madrid, 28049 (Spain)
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.
- OSTI ID:
- 22369802
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Warm dark matter via ultra-violet freeze-in: reheating temperature and non-thermal distribution for fermionic Higgs portal dark matter
Standard Model with a real singlet scalar and inflation