Nonlinear gauge invariance and WZW-like action for NS-NS superstring field theory

TL;DR

This paper develops a complete gauge-invariant WZW-like action for NS-NS superstring field theory in the large Hilbert space, providing explicit formulas for the action and gauge transformations.

Contribution

It presents a closed-form expression for the gauge-invariant action and nonlinear gauge transformations, advancing the formulation of superstring field theory.

Findings

Constructed a WZW-like gauge-invariant action for NS-NS superstring field theory.

Derived explicit nonlinear gauge transformation formulas.

Connected vertices to pure-gauge solutions in heterotic string theory.

Abstract

We complete the construction of a gauge-invariant action for NS-NS superstring field theory in the large Hilbert space begun in arXiv:1305.3893 by giving a closed-form expression for the action and nonlinear gauge transformations. The action has the WZW-like form and vertices are given by a pure-gauge solution of heterotic string field theory in the small Hilbert space.