https://doi.org/10.1140/epjc/s10052-021-09946-4
Regular Article - Theoretical Physics
Gravitational waves from preheating in Gauss–Bonnet inflation
1
Physics and Quantum Technology Team, LPMC, Ben M’sik Faculty of Sciences, Casablanca Hassan II University, Casablanca, Morocco
2
LPHE-MS Laboratory Department of Physics, Faculty of Science, Mohammed V University in Rabat, Rabat, Morocco
Received:
1
August
2021
Accepted:
17
December
2021
Published online:
30
December
2021
We study gravitational wave production in an expanding Universe during the first stages following inflation, and investigate the consequences of the Gauss–Bonnet term on the inflationary parameters for a power-law inflation model with a GB coupling term. Moreover, we perform the analyses on the preheating parameters involving the number of e-folds 
, and the temperature of thermalization 
and show that it’s sensitive to the parameters n, and 
, the parameter is proposed to connect the density energy at the end of inflation to the preheating energy density. We set a correlation of gravitational wave energy density spectrum with the spectral index 
detected by the cosmic microwave background experiments. The density spectrum 
shows good consistency with observation for 
and 
. Our findings suggest that the generation of gravitational waves (GWs) during preheating can satisfy the constraints from Planck’s data.
© The Author(s) 2021
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Funded by SCOAP3
