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Ryusuke Jinno
순수물리이론 연구단
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Gravitational waves from first-order phase transitions: towards model separation by bubble nucleation rate

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Title
Gravitational waves from first-order phase transitions: towards model separation by bubble nucleation rate
Author(s)
Ryusuke Jinno; Sangjun Lee; Hyeonseok Seong; Masahiro Takimoto
Publication Date
2017-11
Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, v., no.11, pp.1 - 33
Publisher
IOP PUBLISHING LTD
Abstract
We study gravitational-wave production from bubble collisions in a cosmic first-order phase transition, focusing on the possibility of model separation by the bubble nucleation rate dependence of the resulting gravitational-wave spectrum. By using the method of relating the spectrum with the two-point correlator of the energy-momentum tensor < T(x)T(y)>, we first write down analytic expressions for the spectrum with a Gaussian correction to the commonly used nucleation rate, Gamma proportional to e(beta t) -> e(beta t-gamma 2t2), under the thin-wall and envelope approximations. Then we quantitatively investigate how the spectrum changes with the size of the Gaussian correction. It is found that the spectral shape shows O(10)% deviation from Gamma proportional to e(beta t) case for some physically motivated scenarios. We also briefly discuss detector sensitivities required to distinguish different spectral shapes (c) 2017 IOP Publishing Ltd and Sissa Medialab
URI
https://pr.ibs.re.kr/handle/8788114/4767
ISSN
1475-7516
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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