From Am−1 trigonometric S-matrices to the thermodynamic Bethe Ansatz

Abstract The thermodynamic Bethe Ansatz equations that have been proposed to describe massive integrable deformations of the coset conformal field theories g k × g 1 / g k + l are shown to result directly by applying the usual thermodynamic Bethe Ansatz arguments to the trigonometric S -matrices for the algebras g = a m −1 .