%0 Journal Article
%T A topological invariant of RG flows in 2D integrable quantum field theories
%A R. Caracciolo
%A F. Gliozzi
%A R. Tateo
%J Physics
%D 1999
%I arXiv
%R 10.1142/S0217979299002757
%X We construct a topological invariant of the renormalization group trajectories of a large class of 2D quantum integrable models, described by the thermodynamic Bethe ansatz approach. A geometrical description of this invariant in terms of triangulations of three-dimensional manifolds is proposed and associated dilogarithm identities are proven.
%U http://arxiv.org/abs/hep-th/9902094v2