A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory

7Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.

This article is free to access.

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.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Camargo-Molina, J. E., Enberg, R., & Löfgren, J. (2021). A new perspective on the electroweak phase transition in the Standard Model Effective Field Theory. Journal of High Energy Physics, 2021(10). https://doi.org/10.1007/JHEP10(2021)127

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 3

50%

Researcher 3

50%

Readers' Discipline

Tooltip

Physics and Astronomy 6

100%

Save time finding and organizing research with Mendeley

Sign up for free