On 1N expansion in (Φ2)33 field theory: Ragnheidur Gudmundsdottir, Gunnar Rydnell, and Per Salomonsson. Institute of Theoretical Physics. S-412 96 Göteborg, Sweden

1N expansion, composite field formalism

1N expansion, composite field formalism and renormalization in (φ2)33 field theory

✍ Ragnheidur Gudmundsdottir; Gunnar Rydnell; Per Salomonsson 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 604 KB

U(N) symmetric three-dimensional (I$')~ theory is studied in the l/N expansion, using quantum field theory techniques. An effective action containing the composite operator +2 is used. It is shown to be renormalizable in each order of the l/N expansion. The lirst two orders are considered. A vacuum