Vertex operator approach for form factors of Belavin's (Z/nZ)-symmetric model

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Belavin's (Z/nZ)-symmetric model is considered on the basis of bosonization of vertex operators in the A⁽¹⁾ₙ₋₁ model and vertex-face transformation. Free field representations of nonlocal tail operators are constructed for off diagonal matrix elements with respect to the ground state sectors. As a result, integral formulae for form factors of any local operators in the (Z/nZ)-symmetric model can be obtained, in principle.