Universal gravitational-wave signatures from heavy new physics in the electroweak sector

Eichhorn, Astrid, Lumma, Johannes, Pawlowski, Jan M, Reichert, Manuel and Yamada, Masatoshi (2021) Universal gravitational-wave signatures from heavy new physics in the electroweak sector. Journal of Cosmology and Astroparticle Physics, 2021 (5). a006. ISSN 1475-7516

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We calculate the gravitational-wave spectra produced by the electroweak phase transition with TeV-scale Beyond-Standard-Model physics in the early universe. Our study captures the effect of quantum and thermal fluctuations within a non-perturbative framework. We discover a universal relation between the mean bubble separation and the strength parameter of the phase transition, which holds for a wide range of new-physics contributions. The ramifications of this result are three-fold: first, they constrain the gravitational-wave spectra resulting from heavy (TeV-scale) new physics. Second, they contribute to distinguishing heavy from light new physics directly from the gravitational-wave signature. Third, they suggest that a concerted effort of gravitational-wave observations together with collider experiments could be required to distinguish between different models of heavy new physics.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Theoretical Particle Physics Research Group
Depositing User: Manuel Reichert
Date Deposited: 31 Aug 2021 14:41
Last Modified: 01 Sep 2021 11:31
URI: http://sro.sussex.ac.uk/id/eprint/101368

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Project NameSussex Project NumberFunderFunder Ref
UnsetUnsetScience and Technology Research Council10.1088/1475-7516/2021/05/006