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Gansukh Tumurtushaa
순수물리이론 연구단
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Constraints on the reheating parameters after Gauss-Bonnet inflation from primordial gravitational waves

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Title
Constraints on the reheating parameters after Gauss-Bonnet inflation from primordial gravitational waves
Author(s)
Seoktae Koh; Bum-Hoon Lee; Gansukh Tumurtushaa
Publication Date
2018-11
Journal
PHYSICAL REVIEW D, v.98, no.10, pp.103511 -
Publisher
American Physical Society
Abstract
We study the effects of the Gauss-Bonnet term on the energy spectrum of inflationary gravitational waves. The models of inflation are classified into two types based on their predictions for the tensor power spectrum: red-tilted (nT<0) and blue-tilted spectra (nT>0), respectively, and then the energy spectra of the gravitational waves are calculated for each type of model. We find that the gravitational wave spectra are enhanced depending on the model parameter if the predicted inflationary tensor spectra have a blue tilt, whereas they are suppressed for the spectra that have a red tilt. Moreover, we perform the analyses on the reheating parameters involving the temperature, the equation-of-state parameter, and the number of e-folds using the gravitational wave spectrum. Our results imply that the Gauss-Bonnet term plays an important role not only during inflation but also during reheating whether the process is instantaneous or lasts for a certain number of e-folds until it thermalizes and eventually completes. (c) 2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/5412
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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