Picture Changing Operators in Closed Fermionic String Field Theory

TL;DR

This paper explores the arrangement of picture changing operators in closed fermionic string field theory to construct gauge invariant interaction vertices for Neveu-Schwarz states, ensuring they satisfy descent equations.

Contribution

It introduces a systematic way to arrange picture changing operators that satisfy descent equations in closed superstring field theory.

Findings

Operators satisfy a set of descent equations.

Method ensures gauge invariance of interaction vertices.

Applicable to heterotic and closed superstring theories.

Abstract

We discuss appropriate arrangement of picture changing operators required to construct gauge invariant interaction vertices involving Neveu-Schwarz states in heterotic and closed superstring field theory. The operators required for this purpose are shown to satisfy a set of descent equations.