Type 0 T-Duality and the Tachyon Coupling

TL;DR

This paper explores T-duality between Type 0A and 0B string theories, constraining tachyon-RR field couplings and proposing a democratic formulation of effective actions without Chern-Simons terms.

Contribution

It introduces a democratic formulation for Type 0 effective actions and analyzes how T-duality constrains tachyon couplings to RR fields.

Findings

T-duality relates Type 0A and 0B theories.

A democratic formulation without Chern-Simons terms is possible.

Embedding of Type II solutions into Type 0 theories is discussed.

Abstract

We consider the T-duality relations between Type 0A and 0B theories, and show that this constraints the possible couplings of the tachyon to the RR-fields. Due to the `doubling' of the RR sector in Type 0 theories, we are able to introduce a democratic formulation for the Type 0 effective actions, in which there is no Chern-Simons term in the effective action. Finally we discuss how to embed Type II solutions into Type 0 theories.