Primordial Gravitational Waves from Phase Transitions during Reheating
read the original abstract
We study primordial gravitational waves (GWs) generated from first-order phase transitions (PTs) during cosmic reheating. Using a minimal particle physics model, and a general parametrization of the inflaton energy density and the evolution of the Standard Model temperature, we explore the conditions under which PTs occur and determine the corresponding PT parameters (the PT temperature, duration and strength), which depend on the evolution of the background during reheating. We find that, in certain cosmological scenarios, PTs can be delayed and prolonged compared to the standard post-inflationary evolution. Incorporating these PT parameters, we compute the resulting GW spectrum generated from the various processes occurring during a first-order PT. We find that, in comparison to the standard cosmological history, the GW amplitude and peak frequency can be modified by several orders of magnitude due to the cosmological evolution during reheating. In particular, the GW spectra could be within the reach of next-generation GW observatories.
This paper has not been read by Pith yet.
Forward citations
Cited by 3 Pith papers
-
Torsion induced one-loop corrections to inflaton decay and the Stochastic gravitational waves
Torsion-induced one-loop corrections can suppress the stochastic gravitational wave signal from inflaton decay by up to two orders of magnitude relative to tree-level predictions.
-
Gravitational Waves from Multiple First-Order Phase Transitions in a Scenario with Early Matter Domination
Early matter domination with time-dependent decay rates produces multiple first-order phase transitions whose gravitational wave signatures encode the transition and reheating temperatures.
-
micrOMEGAs 7: Beyond standard cosmology
micrOMEGAs7 extends the micrOMEGAs code to compute dark matter relic density under user-defined non-standard cosmologies and adds updated experimental constraints.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.