Geodesic Scattering of Solitonic Strings

TL;DR

This paper calculates the moduli space metric for a string soliton in four dimensions, finding it to be flat, which indicates that these solitons do not interact during scattering, aligning with previous theoretical results.

Contribution

It provides the first explicit computation of the moduli space metric for the Dabholkar-Harvey string soliton, demonstrating its flatness at lowest order in string tension.

Findings

The moduli space metric is flat.

Solitons exhibit trivial scattering behavior.

Results agree with previous string scattering calculations.

Abstract

We compute the metric on moduli space for the Dabholkar-Harvey string soliton in $D=4$ to lowest nontrivial order in the string tension. The metric is found to be flat, which implies trivial scattering of the solitons. This result is consistent with an earlier test-string calculation of the leading order dynamical force and a computation of the Veneziano amplitude for the scattering of macroscopic strings.