Implications for FirstOrder Cosmological Phase Transitions from the Third LIGOVirgo Observing Run
Abstract
We place constraints on the normalized energy density in gravitational waves from firstorder strong phase transitions using data from Advanced LIGO and Virgo's first, second, and third observing runs. First, adopting a broken power law model, we place 95% confidence level upper limits simultaneously on the gravitationalwave energy density at 25 Hz from unresolved compact binary mergers, Ω_{CBC}<6.1 ×10^{9}, and strong firstorder phase transitions, Ω_{BPL}<4.4 ×10^{9}. The inclusion of the former is necessary since we expect this astrophysical signal to be the foreground of any detected spectrum. We then consider two more complex phenomenological models, limiting at 25 Hz the gravitationalwave background due to bubble collisions to Ω_{pt}<5.0 ×10^{9} and the background due to sound waves to Ω_{pt}<5.8 ×10^{9} at 95% confidence level for phase transitions occurring at temperatures above 10^{8} GeV .
 Publication:

Physical Review Letters
 Pub Date:
 April 2021
 DOI:
 10.1103/PhysRevLett.126.151301
 arXiv:
 arXiv:2102.01714
 Bibcode:
 2021PhRvL.126o1301R
 Keywords:

 High Energy Physics  Phenomenology;
 General Relativity and Quantum Cosmology
 EPrint:
 7 pages, 3 figures, version published in Physical Review Letters