Abstract
We consider the electroweak phase transition in the conformal extension of the standard model known as SU(2)cSM. Apart from the standard model particles, this model contains an additional scalar and gauge field that are both charged under the hidden SU(2)$_X$. This model generically exhibits a very strong phase transition that proceeds after a large amount of supercooling. We estimate the gravitational wave spectrum produced in this model and show that its amplitude and frequency fall within the observational window of LISA. We also discuss potential pitfalls and relevant points of improvement required to attain reliable estimates of the gravitational wave production in this - as well as in more general - class of models. In order to improve perturbativity during the early stages of transition that ends with bubble nucleation, we solve a thermal gap equation in the scalar sector inspired by the 2PI effective action formalism.
Original language | English |
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Journal | JCAP |
DOIs | |
Publication status | Published - 8 Feb 2019 |
Bibliographical note
32 pages, 9 figures, v2: discussion extended, references added, minor error corrected, v3: discussion of daisy resummation and plots improved, one reference added; version accepted for publication in Journal of Cosmology and Astroparticle PhysicsKeywords
- hep-ph
- astro-ph.CO
- hep-th