Towards the correct prescription of the Problem of divergence of Propagator of Siegal-Zwiebach action from String theory in Fierz-Pauli Gauge in the small mass limit

TL;DR

This paper addresses the divergence issue of the Siegel-Zwiebach propagator in the massless limit by linking it to the transverse-traceless gauge using an advanced BRST method, aiming for correct string theory prescriptions.

Contribution

It introduces an explicit solution to the divergence problem by connecting propagators across gauges through an improved finite-field-dependent BRST approach.

Findings

Successfully relates propagators in different gauges

Resolves divergence issues in the massless limit

Enhances understanding of gauge invariance in string field theory

Abstract

In the present work we will give an explicit solution the problem of divergence of propagator of gauge-invariant Siegel-Zwiebach action in Fierz-Pauli gauge in massless limit by connecting its Greens functions to that of Transverse-Traceless gauge using improved finite-field-dependent BRST method.