PIRSA:15070092 Scientific Series Particle Physics

DOI10.48660/15070092

Series: Particle Physics

Kozaczuk, J. (2015). Exotic Electroweak Symmetry Breaking. Perimeter Institute. https://pirsa.org/15070092

Kozaczuk, Jonathan. Exotic Electroweak Symmetry Breaking. Perimeter Institute, Jul. 31, 2015, https://pirsa.org/15070092 

@misc{ pirsa_PIRSA:15070092,
  doi = {10.48660/15070092},
  url = {https://pirsa.org/15070092},
  author = {Kozaczuk, Jonathan},
  keywords = {Particle Physics},
  language = {en},
  title = {Exotic Electroweak Symmetry Breaking},
  publisher = {Perimeter Institute},
  year = {2015},
  month = {jul},
  note = {PIRSA:15070092 see, \url{https://pirsa.org}}
}

Abstract

Extensions of the Standard Model (SM) Higgs sector often predict the existence of new vacua and can feature novel patterns of symmetry breaking in the early universe. In this talk, I will discuss the implications of such scenarios for electroweak scale cosmology, baryogenesis, and Higgs phenomenology. I will focus on two classes of models, one involving a gauge singlet scalar field and the other an inert SU(2) doublet scalar. The former can give rise to a strong first-order electroweak phase transition, but also to rapidly expanding bubbles which can pose a problem for viable electroweak baryogenesis. In the latter, electroweak symmetry can be spontaneously broken by a first-order phase transition to an exotic vacuum, allowing for successful electroweak baryogenesis decoupled from the Standard Model-like Higgs field. Nevertheless, this class of scenarios generically predicts modifications of the SM-like Higgs couplings within reach of present-day collider experiments.

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