Resonant reheating

doi:10.1088/1475-7516/2024/08/014

2024-08-09

PRE

Basabendu Barman *

Nicolás Bernal

Yong Xu

DOI：10.1088/1475-7516/2024/08/014

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We investigate a novel reheating scenario proceeding through s-channel inflaton annihilation, mediated by a massive scalar. If the inflaton phi oscillates around the minimum of a monomial potential proportional to phi(n) , we reveal the emergence of resonance phenomena originating from the dynamic evolution of the inflaton mass for n > 2 . Consequently, a resonance appears in both the radiation and the temperature evolution during the reheating process. By solving the coupled Boltzmann equations, we present solutions for radiation and temperature. We find non-trivial temperature characteristics during reheating, depending on the value of n and the masses of the inflaton and mediator. Some phenomenological aspects of the model are explored. As a concrete example, we show that the same mediator participates in the genesis of dark matter, modifying the standard freeze-in dynamics. In addition, we demonstrate that the resonant reheating scenario could be tested by next-generation low- and high-frequency gravitational wave detectors.

Keyword:

physics of the early universe

particle physics- cosmology connection

dark matter theory

primordial gravitational waves (theory)

期刊

Journal of Cosmology and Astroparticle Physics

IF:

5.9

论文数:

1.3W

被引数:

4.7W

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srm university-ap

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New York University

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New York University Abu Dhabi

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