Anomaly Cancellation in Noncritical String Theory

TL;DR

This paper constructs new two-dimensional unoriented superstring theories with chiral spectra, demonstrating anomaly cancellation through the addition of specific open string degrees of freedom required by tadpole cancellation.

Contribution

It introduces novel two-dimensional unoriented superstring models with chiral spectra and shows how anomalies are canceled via tadpole conditions.

Findings

Anomaly cancellation achieved in new models

Chiral open string degrees of freedom are essential

Consistent unoriented superstring theories constructed

Abstract

We construct new two dimensional unoriented superstring theories in two dimensions with a chiral closed string spectrum and show that anomalies cancel upon supplying the appropriate chiral open string degrees of freedom imposed by tadpole cancellation.