http://arxiv.org/abs/2112.14650
Cosmological phase transition gravitational wave could provide a novel approach to study the early Universe. In most cases, the acoustic gravitational wave from sound wave mechanism is dominant. We study sound velocity effects on the acoustic phase transition gravitational wave spectrum in the Sound Shell Model using different sound velocities in symmetric and broken phases. We demonstrate that different sound velocities could obviously modify the peak frequency, peak amplitude, and shape of the corresponding gravitational wave power spectra. Therefore, taking more realistic sound velocities might provide more accurate predictions for various gravitational wave experiments.
X. Wang, F. Huang and Y. Li
Thu, 30 Dec 21
41/71
Comments: 22 pages, 7 figures
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