A Note on the Green - Schwarz Mechanism in Open - String Theories

TL;DR

This paper explores a generalized Green-Schwarz mechanism in open superstring models with gauge and antisymmetric tensor fields, illustrating its implications for low-energy effective theories in six dimensions.

Contribution

It introduces a generalized Green-Schwarz mechanism involving multiple antisymmetric tensors in open superstring models with D<10.

Findings

Generalized Green-Schwarz mechanism in certain open superstring models

Implications for low-energy effective field theories in six dimensions

Illustration using simple rational models

Abstract

An interesting feature of some open superstring models in $D < 10$ is the simultaneous presence, in the spectrum, of gauge fields and of a number of antisymmetric tensor fields. In these cases the Green-Schwarz mechanism can (and does) take a generalized form, resulting from the combined action of all the antisymmetric tensors. These novelties are illustrated referring to some simple rational models in six dimensions, and some of their implications for the low-energy effective field theory are pointed out.