SPINON BASIS FOR HIGHER-LEVEL SU(2) WZW MODELS

We propose a spinon basis for the integrable highest weight modules of sl(2) at levels k greater than or equal to 1, and discuss the underly ing Yangian symmetry. Evaluating the characters in this spinon basis p rovides new quasi-particle type expressions for the characters of thes e integrable modules, and explicitly exhibits the structure of an RSOS times a Yangian part, known e.g. from S-matrix results. We briefly di scuss generalizations to other groups and more general conformal field theories.