USp(32) String as Spontaneously Supersymmetry Broken Theory

TL;DR

This paper proves that the supersymmetry breaking in the USp(32) string theory with an orientifold plane is spontaneous, providing insights into the nature of the orientifold as an intrinsic superstring object.

Contribution

It demonstrates the spontaneous supersymmetry breaking mechanism in USp(32) string theory via a trace formula, advancing understanding of orientifold planes in superstring theory.

Findings

Supersymmetry is broken spontaneously, not explicitly.

The trace formula confirms the spontaneous breaking.

Discussion on orientifold planes as intrinsic objects.

Abstract

It was suggested by Sugimoto that there is a new supersymmetry breaking mechanism by an orientifold plane which is oppositely charged as the usual one. Here we prove the trace formula for this system to show that the supersymmetry is broken not explicitly but spontaneously. We also discuss the possibility of interpreting the orientifold plane as an intrinsic object of the superstring theory.