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Walls, bubbles and doom — the cosmology of HEFT

Alonso, R.; Criado, J.C.; Houtz, R.; West, M.

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Authors

J.C. Criado

R. Houtz

Mia West mia.west@durham.ac.uk
PGR Student Doctor of Philosophy



Abstract

As experiment charts new territory at the electroweak scale, the enterprise to characterise all possible theories becomes all the more necessary. In the absence of new particles, this ambitious enterprise is attainable and has led to the Higgs Effective Field Theory (HEFT) as the most general characterising framework, containing the Standard Model Effective Field Theory (SMEFT) as a subspace. The characterisation of this theory space led to the dichotomy SMEFT vs. HEFT SMEFT as the two possible realisations of symmetry breaking. The criterion to distinguish these two possibilities is non-local in field space, and phenomena which explore field space beyond the neighbourhood of the vacuum manifold are in a singular position to tell them apart. Cosmology allows for such phenomena, and this work focuses on HEFT SMEFT, the less explored of the two options, to find that first order phase transitions with detectable gravitational wave remnants, domain wall formation and vacuum decay in the far, far distant future can take place and single out HEFT SMEFT. Results in cosmology are put against LHC constraints, and the potential of future ground- and space-based experiments to cover parameter space is discussed.

Citation

Alonso, R., Criado, J., Houtz, R., & West, M. (2024). Walls, bubbles and doom — the cosmology of HEFT. Journal of High Energy Physics, 2024(5), Article 49. https://doi.org/10.1007/jhep05%282024%29049

Journal Article Type Article
Acceptance Date Apr 3, 2024
Online Publication Date May 6, 2024
Publication Date May 6, 2024
Deposit Date May 13, 2024
Publicly Available Date May 13, 2024
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2024
Issue 5
Article Number 49
DOI https://doi.org/10.1007/jhep05%282024%29049
Keywords SMEFT, Early Universe Particle Physics, Phase Transitions in the Early Universe
Public URL https://durham-repository.worktribe.com/output/2437348

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