4.4 Article

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

Journal

JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 10, Pages -

Publisher

SPRINGER
DOI: 10.1007/JHEP10(2021)127

Keywords

Beyond Standard Model; Cosmology of Theories beyond the SM

Funding

  1. Carl Trygger Foundation [CTS 17:139]
  2. Knut and Alice Wallenberg foundation [KAW 2017.0100]
  3. Swedish National Infrastructure for Computing (SNIC) at UPPMAX [SNIC 2019/8-224, SNIC 2021/22-106]
  4. Swedish Research Council [2018-05973]

Ask authors/readers for more resources

Research shows that a first-order Electroweak Phase Transition is possible in the Standard Model Effective Field Theory when the barrier between minima is generated radiatively. Experimental data reveals key points that agree with a first-order transition.
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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.4
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available