FACTORED COSET MODELS - A UNIFYING APPROACH TO DIFFERENT BOSONIZATIONSCHEMES

We discuss various bosonization schemes from a path integral perspecti ve. Our analysis shows that the existence of different bosonization sc hemes, such as abelian bosonization of non-abelian models and non-abel ian bosonization of fermions with colour and flavour indices, can be u nderstood as different ways of factoring out a dynamically trivial cos et which contains the fermions. From this perspective follows the impo rtance of the coset model in ensuring the comet superselection rules o n the bosonic level. (C) 1998 Elsevier Science B.V.