CERN Accelerating science

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Preprint
Report number arXiv:2003.07360 ; KCL-PH-TH/2020-04 ; CERN-TH-2020-016 ; IFT-UAM/CSIC-20-35
Title Gravitational waves from first-order cosmological phase transitions: lifetime of the sound wave source
Author(s) Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Lewicki, Marek (King's Coll. London ; Warsaw U. (main)) ; No, José Miguel (U. Autonoma, Madrid (main) ; Madrid, IFT)
Imprint 2020-03-16. - 33 p.
Note 32 pages, 14 figures
Subject category hep-ph ; Particle Physics - Phenomenology
Abstract We study particle-physics models for a first-order phase transition in the early universe, including models with polynomial potentials both with and without barriers at zero temperature, and Coleman-Weinberg-like models with potentials that are classically scale-invariant. We distinguish three possibilities for the transition - detonations, deflagrations and hybrids - and consider sound waves and turbulent mechanisms for generating gravitational waves during the transitions in these models. We argue that in models without a zero-temperature barrier and in scale-invariant models the period during which sound waves generate gravitational waves lasts only for a fraction of a Hubble time after a generic first-order cosmological phase transition, whereas it may last longer in some models with a zero-temperature barrier that feature severe supercooling. We illustrate the implications of these results for future gravitational-wave experiments.
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 Record created 2020-03-19, last modified 2020-05-01


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