A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory
Abstract A first-order Electroweak Phase Transition (EWPT) could explain the observed baryon-antibaryon asymmetry and its dynamics could yield a detectable gravitational wave signature, while the underlying physics would be within the reach of colliders. The Standard Model, however, predicts a cross...
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Format: | Article |
Language: | English |
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SpringerOpen
2021-10-01
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Series: | Journal of High Energy Physics |
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Online Access: | https://doi.org/10.1007/JHEP10(2021)127 |
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author | José Eliel Camargo-Molina Rikard Enberg Johan Löfgren |
author_facet | José Eliel Camargo-Molina Rikard Enberg Johan Löfgren |
author_sort | José Eliel Camargo-Molina |
collection | DOAJ |
description | Abstract A first-order Electroweak Phase Transition (EWPT) could explain the observed baryon-antibaryon asymmetry and its dynamics could yield a detectable gravitational wave signature, while the underlying physics would be within the reach of colliders. The Standard Model, however, predicts a crossover transition. We therefore study the EWPT in the Standard Model Effective Field Theory (SMEFT) including dimension-six operators. A first-order EWPT has previously been shown to be possible in the SMEFT. Phenomenology studies have focused on scenarios with a tree-level barrier between minima, which requires a negative Higgs quartic coupling and a new physics scale low enough to raise questions about the validity of the EFT approach. In this work we stress that a first-order EWPT is also possible when the barrier between minima is generated radiatively, the quartic coupling is positive, the scale of new physics is higher, and there is good agreement with experimental bounds. Our calculation is done in a consistent, gauge-invariant way, and we carefully analyze the scaling of parameters necessary to generate a barrier in the potential. We perform a global fit in the relevant parameter space and explicitly find the points with a first-order transition that agree with experimental data. We also briefly discuss the prospects for probing the allowed parameter space using di-Higgs production in colliders. |
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id | doaj.art-efd5568b7dc046c68e783b199b06da2f |
institution | Directory Open Access Journal |
issn | 1029-8479 |
language | English |
last_indexed | 2024-12-22T13:47:57Z |
publishDate | 2021-10-01 |
publisher | SpringerOpen |
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series | Journal of High Energy Physics |
spelling | doaj.art-efd5568b7dc046c68e783b199b06da2f2022-12-21T18:23:45ZengSpringerOpenJournal of High Energy Physics1029-84792021-10-0120211012110.1007/JHEP10(2021)127A new perspective on the electroweak phase transition in the Standard Model Effective Field TheoryJosé Eliel Camargo-Molina0Rikard Enberg1Johan Löfgren2Department of Physics and Astronomy, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityAbstract A first-order Electroweak Phase Transition (EWPT) could explain the observed baryon-antibaryon asymmetry and its dynamics could yield a detectable gravitational wave signature, while the underlying physics would be within the reach of colliders. The Standard Model, however, predicts a crossover transition. We therefore study the EWPT in the Standard Model Effective Field Theory (SMEFT) including dimension-six operators. A first-order EWPT has previously been shown to be possible in the SMEFT. Phenomenology studies have focused on scenarios with a tree-level barrier between minima, which requires a negative Higgs quartic coupling and a new physics scale low enough to raise questions about the validity of the EFT approach. In this work we stress that a first-order EWPT is also possible when the barrier between minima is generated radiatively, the quartic coupling is positive, the scale of new physics is higher, and there is good agreement with experimental bounds. Our calculation is done in a consistent, gauge-invariant way, and we carefully analyze the scaling of parameters necessary to generate a barrier in the potential. We perform a global fit in the relevant parameter space and explicitly find the points with a first-order transition that agree with experimental data. We also briefly discuss the prospects for probing the allowed parameter space using di-Higgs production in colliders.https://doi.org/10.1007/JHEP10(2021)127Beyond Standard ModelCosmology of Theories beyond the SM |
spellingShingle | José Eliel Camargo-Molina Rikard Enberg Johan Löfgren A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory Journal of High Energy Physics Beyond Standard Model Cosmology of Theories beyond the SM |
title | A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory |
title_full | A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory |
title_fullStr | A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory |
title_full_unstemmed | A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory |
title_short | A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory |
title_sort | new perspective on the electroweak phase transition in the standard model effective field theory |
topic | Beyond Standard Model Cosmology of Theories beyond the SM |
url | https://doi.org/10.1007/JHEP10(2021)127 |
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