A Vertex Operator Approach for Form Factors of Belavin's (Z/ n Z)-Symmetric Model and Its Application

[摘要] A vertex operator approach for form factors of Belavin's ( Z / n Z )-symmetric model is constructed on the basis of bosonization of vertex operators in the A n −1 (1) model and vertex-face transformation. As simple application for n =2, we obtain expressions for 2 m -point form factors related to the σ z and σ x operators in the eight-vertex model.

[关键词] vertex operator approach;form factors;Belavin’s (Z/nZ)-symmetric model;integral formulae