Abstract
In this paper we study the renormalization group flow of the ( p, q) minimal (non-unitary) CFT perturbed by the Ф 1, 3 operator with a positive coupling. In the perturbative region q a ̊ (q-p) , we find a new IR fixed point which corresponds to the (2 p- q, p) minimal CFT. The perturbing field near the new IR fixed point is identified with the irrelevant Ф 3, 1 operator. We extend this result to show that the non-diagonal ((A, D)-type) modular invariant partition function of the ( p, q) minimal CFT flows into the (A, D)-type partition function of the (2 p- q, p) minimal CFT and the diagonal partition function into the diagonal.
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