Maximal GW amplitude from bubble collisions in supercooled phase transitions

2025/09/16 by Yamada, Masaki · 3 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2509.13402

Abstract

We extend analytic formulas for the gravitational-wave (GW) spectrum from first-order phase transitions to include cosmic expansion under the thin-wall and envelope approximations. We demonstrate that even for strongly supercooled transitions the GW amplitude is bounded from above. Moreover, the spectral shape, amplitude, and peak frequency remain largely unaffected by the details of the nucleation rate once expressed in terms of the comformal variables.

Citations

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Cited by

• Probing thermal leptogenesis and dark matter through primordial gravitational waves from a supercooled universe
• Beyond the Daisy Chain: Running and the 3D EFT View of Supercooled Phase Transitions
• Analytic derivation of GW spectrum from bubble collisions in FLRW Universe

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