paper

The Logarithmic Conformal Field Theories

arXiv:hep-th/9610168 · doi:10.1016/S0550-3213(97)00230-7

Abstract

We study the correlation functions of logarithmic conformal field theories. First, assuming conformal invariance, we explicitly calculate two-- and three-- point functions. This calculation is done for the general case of more than one logarithmic field in a block, and more than one set of logarithmic fields. Then we show that one can regard the logarithmic field as a formal derivative of the ordinary field with respect to its conformal weight. This enables one to calculate any -- point function containing the logarithmic field in terms of ordinary --point functions. At last, we calculate the operator product expansion (OPE) coefficients of a logarithmic conformal field theory, and show that these can be obtained from the corresponding coefficients of ordinary conformal theory by a simple derivation.

17 pages ,latex , some minor changes, to appear in Nucl. Phys. B

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