Dyon dynamics near marginal stability and non-BPS states

TL;DR

This paper derives an effective action describing long-range interactions of dyons in N=2 gauge theories, analyzing bound states near marginal stability and computing mass corrections for non-BPS states.

Contribution

It provides a general form of the moduli-space effective action for dyons, enabling analysis of BPS and non-BPS bound states near marginal stability.

Findings

Derived the moduli-space effective action for dyon interactions.

Analyzed bound state structures near marginal stability.

Computed leading mass corrections for non-BPS states.

Abstract

We derive the general form of the moduli-space effective action for the long-range interaction of two BPS dyons in N=2 gauge theories. This action determines the bound state structure of various BPS and non-BPS states near marginal stability curves, and we utilise it to compute the leading correction to the BPS-mass of zero-torsion non-BPS bound states close to marginal stability.