Regular Article - Theoretical Physics
Gravitational waves from colliding vacuum bubbles in gauge theories
Faculty of Physics, University of Warsaw, ul. Pasteura 5, 02-093, Warsaw, Poland
2 Institut de Fisica d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193, Bellaterra, Barcelona, Spain
Accepted: 12 May 2021
Published online: 21 May 2021
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 after collisions. This leads to a GW spectrum that follows at low frequencies and at high frequencies, marking a significant deviation from the popular envelope approximation.
© The Author(s) 2021
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