Factorization of the Two Loop Four-Particle Amplitude in Superstring Theory Revisited

TL;DR

This paper revisits the factorization of the two-loop four-particle amplitude in superstring theory, correcting previous discrepancies and providing detailed calculations of scalar correlators and kinematic factors.

Contribution

It offers a refined analysis of the amplitude factorization, including missing factors and detailed calculations, improving the understanding of superstring two-loop amplitudes.

Findings

Corrected missing factors in scalar correlators

Provided detailed calculation methods for kinematic factor

Enhanced accuracy of superstring two-loop amplitude analysis

Abstract

We study in detail the factorization of the newly obtained two-loop four-particle amplitude in superstring theory. In particular some missing factors from the scalar correlators are obtained correctly, in comparing with a previous study of the factorization in two-loop superstring theory. Some details for the calculation of the factorization of the kinematic factor are also presented.