Gravitational waves from colliding vacuum bubbles in gauge theories
Abstract 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 s...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2021-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-09232-3 |
| Summary: | Abstract 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 $$\propto R^{-3}$$ ∝ R - 3 after collisions. This leads to a GW spectrum that follows $$\Omega _{\mathrm{GW}} \propto \omega ^{2.3}$$ Ω GW ∝ ω 2.3 at low frequencies and $$\Omega _{\mathrm{GW}} \propto \omega ^{-2.9}$$ Ω GW ∝ ω - 2.9 at high frequencies, marking a significant deviation from the popular envelope approximation. |
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| ISSN: | 1434-6044 1434-6052 |