Comments on BPS Bound State Decay

TL;DR

This paper investigates the decay of BPS states in N=2 SYM theory with matter, demonstrating a semiclassical mechanism via soliton-fermion bound states that explains how BPS states can decay under monodromies.

Contribution

It introduces a semiclassical framework using soliton-fermion bound states to explain BPS state decay in N=2 SYM with matter, linking classical solutions to quantum decay phenomena.

Findings

Classical solutions show BPS state decay behavior.

Soliton-fermion bound states model decay mechanisms.

Monodromies induce non-conservation of S-charge.

Abstract

In N=2 SYM theory with matter non-conservation of the S-charge of a BPS state under monodromies leads to so-called BPS state "decay". A mechanism for such a behavior on the semiclassical level could be established through consideration of soliton-fermion bound state. Solutions to classical equations of motion allow to observe the BPS state "decay" in vivo.