Equivalence of Two-Loop Superstring Amplitudes in the Pure Spinor and RNS Formalisms
Nathan Berkovits, Carlos R. Mafra
Abstract
The pure spinor formalism for the superstring has recently been used to compute massless four-point two-loop amplitudes in a manifestly super-Poincare covariant manner. In this paper, we show that when all four external states are Neveu-Schwarz, the two-loop amplitude coincides with the RNS result.
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