BRST approach to minimal models

  title={BRST approach to minimal models},
  author={G. Felder},
  journal={Nuclear Physics},
  • G. Felder
  • Published 1989
  • Physics
  • Nuclear Physics
We introduce a BRST charge in a series of Coulomb gas models in two dimensions. We show that these models, once restricted to BRST states, are equivalent to the minimal two-dimensional conformal invariant models of Belavin, Polyakov and Zamolodchikov. Primary chiral fields are identified with BRST invariant vertex operators with screening charges. These operators are non-vanishing if and only if the “fusion rules” are fulfilled. As an application, we prove a Feigin-Fuks integral representation… Expand