Type -B/ -O Bosonic String Sigma-Models

TL;DR

This paper develops world sheet actions for bosonic strings coupled to tachyon and massless states in type-B and type-O theories, extending previous models and introducing fermionization techniques.

Contribution

It introduces non-supersymmetric world sheet actions for type-B and type-O bosonic string theories, derived from truncations and fermionization of existing models.

Findings

Derived world sheet actions for type-B and type-O theories.

Connected type-B theory to previous heterotic string models.

Presented a fermionization approach for type-O theory.

Abstract

We provide world sheet non-supersymmetrical actions that describe the coupling of a bosonic string to the tachyon and massless states of both the type-B and type-O theories. The type-B theory is derived as a truncation and chiral doubling of the Ramond-Ramond sector in our previous model that connected the (1,0) heterotic string to a 10 D type IIB supergravity background. The type-O theory then follows from a ``fermionization'' of the type-B theory.