Orbits of a String around a Fivebrane

TL;DR

This paper classifies the classical orbits of a test string around a heterotic fivebrane, revealing unique orbit types and angular momentum properties that differ from general relativity predictions.

Contribution

It provides a detailed classification of string orbits around a fivebrane, highlighting differences from classical gravitational predictions and introducing intrinsic angular momentum effects.

Findings

Orbits are either circular or open, not conic.

Inverse square law does not hold at long range.

Total angular momentum includes an intrinsic component.

Abstract

The classical orbits of a test string in the transverse space of a singular heterotic fivebrane source are classified. The orbits are found to be either circular or open, but not conic because the inverse square law is not satisfied at long range. This result differs from predictions of General Relativity. The conserved total angular momentum contains an intrinsic component from the fivebrane source, analogous to the electron-monopole case.