K.-H. Rehren (Univ. Goettingen)
Chiral Observables and Modular Invariants
(87K, Latex2e)

ABSTRACT.  Various definitions of chiral observables in a given Moebius 
covariant two-dimensional theory are shown to be equivalent. 
Their representation theory in the vacuum Hilbert space of the 
2D theory is studied. It shares the general characteristics 
of modular invariant partition functions, although SL(2,Z) 
transformation properties are not assumed. First steps towards 
classification are made.