Factorization and Unitarity in Superstring Theory
Zhi-Guang Xiao, Chuan-Jie Zhu
TL;DR
This paper determines the two-loop four-particle amplitude coefficient in superstring theory by detailed calculations of tree and one-loop amplitudes, ensuring consistency through factorization and unitarity principles.
Contribution
It introduces a comprehensive method to compute superstring amplitudes at two loops using factorization and unitarity, providing a consistent determination of the amplitude coefficients.
Findings
Successfully computed all relevant tree and one-loop amplitudes.
Determined the overall coefficient of the two-loop four-particle amplitude.
Validated the consistency of superstring amplitude calculations.
Abstract
The overall coefficient of the two-loop 4-particle amplitude in superstring theory is determined by making use of the factorization and unitarity. To accomplish this we computed in detail all the relevant tree and one-loop amplitudes involved and determined their overall coefficients in a consistent way.
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