Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 81, Issue 5, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-021-09232-3
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Funding
- Polish National Science Center [2018/31/D/ST2/02048]
- Spanish State Research Agency
- Polish National Agency for Academic Exchange within Polish Returns Programme [PPN/PPO/2020/1/00013/U/00001]
- CERCA program of the Generalitat de Catalunya
- [FPA2017-88915-P]
- [SEV-2016-0588]
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The research focuses on the production of gravitational waves in strongly supercooled cosmological phase transitions within gauge theories. The study finds that the gravitational wave source decays with bubble radius as proportional to R-3 after collisions, resulting in a significant deviation from the popular envelope approximation in the gravitational wave spectrum.
We study production of gravitational waves (GWs) in strongly supercooled cosmological phase transitions in gauge theories. We extract from two-bubble lattice simulations the scaling of the GW source, and use it in many-bubble simulations in the thin-wall limit to estimate the resulting GW spectrum. We find that in presence of the gauge field the GW source decays with bubble radius as proportional to R-3 after collisions. This leads to a GW spectrum that follows omega(GW)proportional to omega(2.3) at low frequencies and omega(GW)proportional to omega(-2.9) at high frequencies, marking a significant deviation from the popular envelope approximation.
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