Freeze-in from preheating. Issue 3 (1st March 2022)

• Record Type: Journal Article
• Authors: Garcia, Marcos A.G.; Kaneta, Kunio; Mambrini, Yann; Olive, Keith A.; Verner, Sarunas
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 3(2022)
• Publication Date: 2022-03-01
• Subjects: dark matter theory -- inflation -- physics of the early universe; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/03/016
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: We consider the production of dark matter during the process of reheating after inflation. The relic density of dark matter from freeze-in depends on both the energy density and energy distribution of the inflaton scattering or decay products composing the radiation bath. We compare the perturbative and non-perturbative calculations of the energy density in radiation. We also consider the (likely) possibility that the final state scalar products are unstable. Assuming either thermal or non-thermal energy distribution functions, we compare the resulting relic density based on these different approaches. We show that the present-day cold dark matter density can be obtained through freeze-in from preheating for a large range of dark matter masses.