# name
O(N)-symmetric (lambda)(phi)4 theory: the gaussin effective potential approach

# metadata.dc.description.abstract[].value
The O(N)-symmetric generalization of λ
φ
4
 theory is studied in the Gaussian-effective-potential (GEP) approach. It is shown that the GEP encompasses and transcends the leading-order 1/N expansion results. We find two distinct, nontrivial versions of the (3+1)-dimensional theory: (i) ‘‘precarious 
φ
4
theory,’’ with negative, infinitesimal 
λ
B
, which coincides with the 1/N result; and (ii) ‘‘autonomous 
φ
4
theory,’’ with positive, infinitesimal 
λ
B
 and an infinite wave-function renormalization, which is inaccessible to perturbative or 1/N methods, and could well have eluded lattice-based approaches. ‘‘Autonomous 
φ
4
 theory’’ can exhibit spontaneous symmetry breaking, and we speculate on its relevance for the Higgs mechanism.

# metadata.dc.relation.isformatof[].value
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.35.2407

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
O(N)-symmetric (lambda)(phi)4 theory: the gaussin effective potential approach