Local BRST cohomology of the gauged principal nonlinear sigma model

Feb, 1998
31 pages
Published in:
  • Phys.Rev.D 58 (1998) 025017
e-Print:
Report number:
  • ULB-TH-98-03

Citations per year

199820022006201020143210
Abstract:
The local BRST cohomology of the gauged non-linear sigma model on a group manifold is worked out for any Lie group G. We consider both, the case where the gauge field is dynamical and the case where it has no kinetic term (G/G topological theory). Our results shed a novel light on the problem of gauging the WZW term as well as on the nature of the topological terms introduced a few years ago by De Wit, Hull and Rocek. We also consider the BRST cohomology of the rigid symmetries of the ungauged model and recover the results of D'Hoker and Weinberg on the most general effective actions compatible with the symmetries.
Note:
  • no figures, some references added, typos corrected Report-no: ULB-TH-98/03
  • sigma model: nonlinear
  • gauge field theory: Yang-Mills
  • cohomology: Becchi-Rouet-Stora
  • Wess-Zumino term
  • field theory: topological
  • perturbation theory
  • ghost
  • bibliography