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Gravitational wave spectra from strongly supercooled phase transitions

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arxiv 2007.04967 v2 pith:DXKNFDKL submitted 2020-07-09 astro-ph.CO hep-ph

classification astro-ph.COhep-ph
keywords fieldomegascalarspectrumgravitationalphaseproptosimulations
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abstract

We study gravitational wave (GW) production in strongly supercooled cosmological phase transitions, taking particular care of models featuring a complex scalar field with a U$(1)$ symmetric potential. We perform lattice simulations of two-bubble collisions to properly model the scalar field gradients, and compute the GW spectrum sourced by them using the thin-wall approximation in many-bubble simulations. We find that in the U$(1)$ symmetric case the low-frequency spectrum is $\propto\omega$ whereas for a real scalar field it is $\propto\omega^3$. In both cases the spectrum decays as $\omega^{-2}$ at high frequencies.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Thermalization effects on the dynamics of growing vacuum bubbles

    hep-ph 2024-11 conditional novelty 6.0 of 10

    Bubble-wall terminal velocity depends on plasma thermalization; non-equilibrium and free-streaming regimes give slower or different walls, and stationary solutions can be bypassed by runaways.

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