Simpler Superstring Scattering

TL;DR

This paper introduces a new, simpler method for calculating superstring scattering amplitudes that maintains manifest spacetime supersymmetry and avoids complex insertions, demonstrated through tree and loop amplitude evaluations.

Contribution

A novel, more straightforward approach using the ghost pyramid for superstring amplitude calculations, eliminating the need for pictures or non-vertex insertions.

Findings

Successfully evaluated tree amplitudes

Successfully evaluated loop amplitudes

Method simplifies superstring scattering calculations

Abstract

We give a new, manifestly spacetime-supersymmetric method for calculating superstring scattering amplitudes, using the ghost pyramid, that is simpler than all other known methods. No pictures nor non-vertex insertions are required other than the usual b and c ghosts of the bosonic string. We evaluate some tree and loop amplitudes as examples.