Gravitational waves from non-Abelian gauge fields at a tachyonic transition

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, Department of Physics en
dc.contributor.author Tranberg, Anders
dc.contributor.author Tähtinen, Sara
dc.contributor.author Weir, David J.
dc.date.accessioned 2019-11-21T07:44:01Z
dc.date.available 2019-11-21T07:44:01Z
dc.date.issued 2018-04
dc.identifier.citation Tranberg , A , Tähtinen , S & Weir , D J 2018 , ' Gravitational waves from non-Abelian gauge fields at a tachyonic transition ' , Journal of Cosmology and Astroparticle Physics , vol. 2018 , no. 4 , 012 . https://doi.org/10.1088/1475-7516/2018/04/012 en
dc.identifier.issn 1475-7516
dc.identifier.other PURE: 105348122
dc.identifier.other PURE UUID: 265e7cfe-b32f-4436-8f89-b335093e7fd0
dc.identifier.other WOS: 000429246500001
dc.identifier.other Scopus: 85047497465
dc.identifier.other ORCID: /0000-0001-6986-0517/work/44189449
dc.identifier.uri http://hdl.handle.net/10138/307151
dc.description.abstract We compute the gravitational wave spectrum from a tachyonic preheating transition of a Standard Model-like SU(2)-Higgs system. Tachyonic preheating involves exponentially growing IR modes, at scales as large as the horizon. Such a transition at the electroweak scale could be detectable by LISA, if these non-perturbatively large modes translate into non-linear dynamics sourcing gravitational waves. Through large-scale numerical simulations, we find that the spectrum of gravitational waves does not exhibit such IR features. Instead, we find two peaks corresponding to the Higgs and gauge field mass, respectively. We find that the gravitational wave production is reduced when adding non-Abelian gauge fields to a scalar-only theory, but increases when adding Abelian gauge fields. In particular, gauge fields suppress the gravitational wave spectrum in the IR. A tachyonic transition in the early Universe will therefore not be detectable by LISA, even if it involves non-Abelian gauge fields. en
dc.format.extent 18
dc.language.iso eng
dc.relation.ispartof Journal of Cosmology and Astroparticle Physics
dc.rights en
dc.subject cosmological phase transitions en
dc.subject physics of the early universe en
dc.subject primordial gravitational waves (theory) en
dc.subject LOW-SCALE INFLATION en
dc.subject HYBRID INFLATION en
dc.subject SYMMETRY-BREAKING en
dc.subject BARYOGENESIS en
dc.subject 115 Astronomy, Space science en
dc.title Gravitational waves from non-Abelian gauge fields at a tachyonic transition en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1088/1475-7516/2018/04/012
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion
dc.contributor.pbl
dc.contributor.pbl

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