Super-Poincare Covariant Two-Loop Superstring Amplitudes

TL;DR

This paper presents a super-Poincare covariant method for calculating two-loop four-point superstring amplitudes in ten dimensions, simplifying previous complex computations and including both bosonic and fermionic external states.

Contribution

It introduces a simplified super-Poincare covariant approach for two-loop superstring amplitude calculations, improving upon the complexity of earlier RNS formalism methods.

Findings

Simplified two-loop four-point amplitude calculations in ten-dimensional superstring theory.

Inclusion of both bosonic and fermionic external states in the amplitudes.

Enhanced computational efficiency over traditional RNS formalism.

Abstract

The super-Poincare covariant formalism for the superstring is used to compute massless four-point two-loop amplitudes in ten-dimensional superspace. The computations are much simpler than in the RNS formalism and include both external bosons and fermions.