09/06/2005, 14:00 — 15:00 — Room P3.10, Mathematics Building
Ricardo Schiappa, Instituto Superior Técnico
BRST Cohomology and Characters of Pure SpinorsIn this talk we shall review the pure spinor approach for the super-Poincaré BRST covariant quantization of the superstring. We will focus on the BRST operator, its cohomology and the computation of central charges in the pure spinor conformal field theory, where the ghosts are constrained to be pure spinors. This will mainly review work due to Nathan Berkovits and will be at a broad/informal level.