paper

Conserved Currents, Consistency Relations and Operator Product Expansions in the Conformally Invariant O(N) Vector Model

arXiv:hep-th/9410093 · doi:10.1006/aphy.1996.0068

Abstract

We discuss conserved currents and operator product expansions (OPE's) in the context of a invariant conformal field theory. Using OPE's we find explicit expressions for the first few terms in suitable short-distance limits for various four-point functions involving the fundamental -component scalar field , . We propose an alternative evaluation of these four-point functions based on graphical expansions. Requiring consistency of the algebraic and graphical treatments of the four-point functions we obtain the values of the dynamical parameters in either a free theory of massless fields or a non-trivial conformally invariant vector model in , up to next-to-leading order in a expansion. Our approach suggests an interesting duality property of the critical invariant theory. Also, solving our consistency relations we obtain the next-to-leading order in correction for which corresponds to the normalisation of the energy momentum tensor two-point function.

45 pages Latex + 2 uuencoded PostScript figures, DAMTP 94/12

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