Gaussian effective potential for the standard model SU(2)xU(1) electroweak theory

Abstract

The Gaussian Effective Potential (GEP) is derived for the non-Abelian SU(2)xU(1) gauge theory of electroweak interactions. First the problem of gauge invariance is addressed in the Abelian U(1) theory, where an optimized GEP is shown to be gauge invariant. The method is then extended to the full non-Abelian gauge theory where, at variance with naive derivations, the GEP is proven to be a genuine variational tool in any gauge. The role of ghosts is discussed and the unitarity gauge is shown to be the only choice which allows calculability without insertion of further approximations. The GEP for the standard model is derived and its predictions are compared to the known phenomenology, thus showing that the GEP provides an alternative non-perturbative description of the known experimental data. By a consistent renormalization of masses the full non-Abelian calculation confirms the existence of a light Higgs boson in the non-perturbative strong coupling regime of the Higgs sector.

References in corpus (8)

• A variational approach to the QCD wave functional:Dynamical mass generation and confinement
• A variational study of bound states in the Higgs model
• A variational method from the variance of energy
• Gaussian Effective Potential and superconductivity
• Self-consistent variational approach to the minimal left-right symmetric model of electroweak interactions
• Light Higgs bosons from a strongly interacting Higgs sector
• A Truly Minimal Left-Right Symmetric Extension of the Standard Model
• A general interpolation scheme for thermal fluctuations in superconductors

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• Gaussian Effective Potential and Antiferromagnetism in the Hubbard Model
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