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Relic gravitational waves from the chiral plasma instability in the standard cosmological model
Stockholms universitet, Nordiska institutet för teoretisk fysik (Nordita). Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för astronomi. Ilia State University, USA; Carnegie Mellon University, USA.ORCID-id: 0000-0002-7304-021X
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Rekke forfattare: 52024 (engelsk)Inngår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 109, nr 4, artikkel-id 043534Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In the primordial plasma, at temperatures above the scale of electroweak symmetry breaking, the presence of chiral asymmetries is expected to induce the development of helical hypermagnetic fields through the phenomenon of chiral plasma instability. It results in magnetohydrodynamic turbulence due to the high conductivity and low viscosity and sources gravitational waves that survive in the universe today as a stochastic polarized gravitational wave background. In this article, we show that this scenario only relies on Standard Model physics, and therefore the observable signatures, namely the relic magnetic field and gravitational background, are linked to a single parameter controlling the initial chiral asymmetry. We estimate the magnetic field and gravitational wave spectra, and validate these estimates with 3D numerical simulations.

sted, utgiver, år, opplag, sider
2024. Vol. 109, nr 4, artikkel-id 043534
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URN: urn:nbn:se:su:diva-228138DOI: 10.1103/PhysRevD.109.043534ISI: 001179504700003Scopus ID: 2-s2.0-85188212790OAI: oai:DiVA.org:su-228138DiVA, id: diva2:1850352
Tilgjengelig fra: 2024-04-10 Laget: 2024-04-10 Sist oppdatert: 2024-04-10bibliografisk kontrollert

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