Gravitational waves from first-order phase transitions: Towards model separation by bubble nucleation rate

Author
Jinno, Ryusuke · Lee, Sangjun · Seong, Hyeonseok · Takimoto, Masahiro
Year 2017
  See all Details

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 $\left< T(x)T(y) \right>$, we first write down analytic expressions for the spectrum with a Gaussian correction to the commonly used nucleation rate, $\Gamma \propto e^{\beta t}\rightarrow e^{\beta t-\gamma^2t^2}$, 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 ${\mathcal O}(10)\%$ deviation from $\Gamma \propto e^{\beta t}$ case for some physically motivated scenarios. We also briefly discuss detector sensitivities required to distinguish different spectral shapes.

Reviews

Write Review

Saving... Saving... Cancel Save Cancel

Details

Title
Gravitational waves from first-order phase transitions: Towards model separation by bubble nucleation rate
Author
Jinno, Ryusuke · Lee, Sangjun · Seong, Hyeonseok · Takimoto, Masahiro
Year
2017
Type
Research Article
Language
eng
Comment
36 pages, 13 figures, 1 figure from arXiv:1605.01403
History
2017-08-03 00:00:00
Categories
High Energy Physics · Theory · Phenomenology · General Relativity and Quantum Cosmology
This is Version 1 of this record. We added this version on August 5, 2017. This version is based on an original data import from arXiv.org e-Print archive.