The Gaussian effective potential is derived for the non-Abelian SU(2)×U(1) gauge theory of electroweak interactions. At variance with naive derivations, the Gaussian effective potential 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 full non-Abelian calculation confirms the existence of a light Higgs boson in the nonperturbative strong coupling regime of the Higgs sector.
|Data di pubblicazione:||2008|
|Titolo:||Gaussian effective potential for the standard model SU(2)×U(1) electroweak theory|
|Citazione:||Siringo, F., & Marotta, L. (2008). Gaussian effective potential for the standard model SU(2)×U(1) electroweak theory. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 78, 016003-1-016003-9.|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevD.78.016003|
|Appare nelle tipologie:||1.01 Articolo in rivista|