Fusion rules, four-point functions and discrete symmetries of N = 2 superconformal models

Abstract

Fusion rules, structure constants and four-point functions for all the fields of N = 2 superconformal minimal models ( c ⩽ 3) are derived. It is shown that the additional Z p+2 symmetries of these models are generated by specific N = 2 superfields which close the N = 2 superparafermionic algebra. General results are applied to the four- and three-generation Gepner tensor product models and the allowed Yukawa couplings are found.