Sound velocity effects on the phase transition gravitational wave spectrum in the sound shell model

Xiao Wang, Fa Peng Huang, Yongping Li

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

A cosmological first-order phase transition gravitational wave could provide a novel approach to studying the early Universe. In most cases, the acoustic gravitational wave from the sound wave mechanism is dominant. Considering different sound velocities in symmetric and broken phases, we study sound velocity effects on the acoustic phase transition gravitational wave spectra in the sound shell model. We demonstrate that different sound velocities could obviously modify the peak frequency and peak amplitude of the gravitational wave power spectra. Therefore, taking more realistic sound velocities might provide more accurate predictions for various gravitational wave experiments.

Original languageEnglish
Article number103513
Number of pages15
JournalPhysical Review D
Volume105
Issue number10
DOIs
Publication statusPublished - 11 May 2022
Externally publishedYes

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