Amplitude for N-Gluon Superstring Scattering

TL;DR

This paper derives exact superstring scattering amplitudes for N gluons in maximally helicity violating configurations, including all alpha' corrections, advancing understanding of string effects on gluon interactions.

Contribution

It provides the first exact all-orders alpha' expressions for N-gluon superstring amplitudes in specific helicity configurations, with explicit corrections to Yang-Mills results.

Findings

Exact amplitudes for N=4, 5, 6 gluons in superstring theory.

Leading alpha'^2 corrections to Yang-Mills amplitudes.

Validation of string corrections in gluon scattering processes.

Abstract

We consider scattering processes involving N gluonic massless states of open superstrings with certain Regge slope alpha'. At the semi-classical level, the string world-sheet sweeps a disk and N gluons are created or annihilated at the boundary. We present exact expressions for the corresponding amplitudes, valid to all orders in alpha', for the so-called maximally helicity violating configurations, with N=4, 5 and N=6. We also obtain the leading O(alpha'^2) string corrections to the zero-slope N-gluon Yang-Mills amplitudes.