Abstract :
Quantized enveloping algebrasU(image) and their representations provide natural settings for the action of the corresponding braid groups. Objects of particular interest are the zero weight spaces ofU(image)-modules since they are stable under the braid group action. We show that for image=imageimagenthere is a class of simpleU(imageimagen)-modules for which the action of the Artin braid groupBnon the zero weight space is irreducible.