Topological Terms in String Theory on Orbifolds

TL;DR

This paper investigates topological terms in string theory on orbifolds, providing physical interpretations and exploring the potential for new modular invariant models within the orbifold framework.

Contribution

It introduces a novel analysis of topological terms in orbifold string models and discusses the possibility of new modular invariant orbifold constructions.

Findings

Physical interpretations of topological terms provided

Potential for new modular invariant orbifold models identified

Framework for analyzing topological invariants in orbifolds established

Abstract

We study toroidal orbifold models with topologically invariant terms in the path integral formalism and give physical interpretations of the terms from an operator formalism point of view. We briefly discuss a possibility of a new class of modular invariant orbifold models.