"TRIVIALITY" MADE EASY: the real (lambda Phi4)4 story
M. Consoli, P. M. Stevenson
Abstract
The real meaning of `triviality' of (lambda Phi4)4 theory is outlined. Assuming `triviality' leads to an effective potential that is just the classical potential plus the zero-point energy of the free-field fluctuations. This Veff gives spontaneous symmetry breaking. Its proper renormalization has the consequence that all scattering amplitudes vanish, self-consistently validating the original assumption. Nevertheless, the theory is physically distinguishable from a free field theory; it has a symmetry-restoring phase transition at a finite critical temperature.
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