Reparametrization Invariance in Inclusive Decays of Heavy Hadrons
  Reparametrization invariance is the invariance of the heavy mass limit under small changes of the heavy-quark four velocity. We discuss the implications of this invariance for non-local light cone operators, the matrix elements of which are relevant for the leading and subleading shape functions describing differential rates for inclusive heavy-to-light transitions. 
Francisco Campanario and Thomas Mannel (TTP Karlsruhe)