Fermionic Basis in Conformal Field Theory and Thermodynamic Bethe Ansatz for Excited States II

Sergei Adler, Hermann Boos

We consider the XXZ spin chain in the scaling limit in the Matsubara direction. The main result of this paper is new representations for the functions $\Psi (l,\kappa )$ and $\Theta (l,m;\kappa ,\alpha )$…