Using arguments based on BRST cohomology, the pure spinor formalism for the superstring in an AdS5 × S5 background is proven to be BRST invariant and conformally invariant at the quantum level to all orders in perturbation theory. Cohomology arguments are also used to prove the existence of an infinite set of non-local BRST-invariant charges at the quantum level.
Journal of High Energy Physics
- Pub Date:
- March 2005
- Superstrings and Heterotic Strings AdS-CFT and dS-CFT Correspondence;
- High Energy Physics - Theory
- 14 pages harvmac tex, added footnotes 3-6 which give more details on the BRST cohomology arguments