On the N=2 Superstring BRST Operator

Abstract

We write the BRST operator of the N=2 superstring as $Q= e^{-R} (\oint \frac{dz}{2πi} ~ b γ_+ γ_-)e^R$ where $b$ and $gamma_\pm$ are super-reparameterization ghosts. This provides a trivial proof of the nilpotence of this operator.