Inflaton oscillations and post-inflationary reheating

Garcia, Marcos A.G.; Kaneta, Kunio; Mambrini, Yann; Olive, Keith A.

doi:10.1088/1475-7516/2021/04/012

Title: Inflaton oscillations and post-inflationary reheating

Journal Article · Tue Apr 06 00:00:00 EDT 2021 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2021/04/012· OSTI ID:1837513

Garcia, Marcos A.G. ^[1]; Kaneta, Kunio ^[2]; Mambrini, Yann ^[3]; Olive, Keith A. ^[4]

Inst. de Física Teórica (IFT) UAM-CSIC, Madrid (Spain); Univ. Autónoma de Madrid (UAM) (Spain)
Korea Inst. for Advanced Study, Seoul (Korea)
Univ. Paris-Saclay, Orsay (France)
Univ. of Minnesota, Minneapolis, MN (United States)

We analyze in detail the perturbative decay of the inflaton oscillating about a generic form of its potential V(Φ) = Φ^k, taking into account the effects of non-instantaneous reheating. We show that evolution of the temperature as a function of the cosmological scale factor depends on the spin statistics of the final state decay products when k > 2. Here, we also include the inflaton-induced mass of the final states leading to either kinematic suppression or enhancement if the final states are fermionic or bosonic respectively. We compute the maximum temperature reached after inflation, the subsequent evolution of the temperature and the final reheat temperature. We apply our results to the computation of the dark matter abundance through thermal scattering during reheating. We also provide an example based on supersymmetry for the coupling of the inflaton to matter.

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Research Organization:: Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0011842

OSTI ID:: 1837513

Journal Information:: Journal of Cosmology and Astroparticle Physics, Vol. 2021, Issue 04; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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