Affiliation:
1. INFN, Sez. di Bologna and Dip. di Fisica, Università di Bologna, Via Irnerio 46, I–40126 Bologna, Italy
Abstract
We consider a wide class of two-dimensional models as gauge theories, the Gross-Neveu model, O(N) and CPN−1-like models using a formalism based on the introduction of bilocal fields that permits us to perform easily the large N expansion of this set of models in a unified and general way. We mainly discuss the SU(N) gauge field theory minimally coupled to fermionic plus bosonic matter in the fundamental representation, and we obtain within the path integral approach exact equations for the particle spectrum, also in the presence of renormalizable polynomial potentials. Finally, we discuss the correspondence between this new approach and the one previously used in the context of the O(N) vector models.
Publisher
World Scientific Pub Co Pte Lt
Subject
Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics
Cited by
20 articles.
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