2020/12/31 by Marek Lewicki, Ville Vaskonen · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Bubble #Cosmology and Gravitation Theories #False vacuum #Gauge (firearms) #Gauge theory #Gravitation #Gravitational wave #Pulsars and Gravitational Waves Research #RADIUS #Scaling #astro-ph.CO #hep-ph
paper · pdf · doi:10.1140/epjc/s10052-021-09232-3
10 pages, 5 figures. fixed a small mistake in the computation of the GW spectrum, minor changes in the results
openalex created_date 2020/12/21 · openalex publication_date 2021/05/01 · arxiv created 2021/11/17 · arxiv updated 2021/11/18 · openalex updated_date 2026/08/05
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 ∝ R-3 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>∝</mml:mo> <mml:msup> <mml:mi>R</mml:mi> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>3</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> after collisions. This leads to a GW spectrum that follows Ω GW ∝ ω 2.3 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Ω</mml:mi> <mml:mi>GW</mml:mi> </mml:msub> <mml:mo>∝</mml:mo> <mml:msup> <mml:mi>ω</mml:mi> <mml:mrow> <mml:mn>2.3</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> at low frequencies and Ω GW ∝ ω -2.9 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Ω</mml:mi> <mml:mi>GW</mml:mi> </mml:msub> <mml:mo>∝</mml:mo> <mml:msup> <mml:mi>ω</mml:mi> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>2.9</mml:mn> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> at high frequencies, marking a significant deviation from the popular envelope approximation.