Massless Limits of Massive Tensor Fields II --- Infrared regularization of Fierz-Pauli model ---

TL;DR

This paper applies Izawa's gauge-fixing procedure twice to the Fierz-Pauli massive tensor field theory, demonstrating how the second application removes residual massless singularities and clarifies the massless limit.

Contribution

It introduces a novel double gauge-fixing approach to better handle massless singularities in the Fierz-Pauli model.

Findings

Second gauge-fixing removes residual singularities

Massless limit of the tensor field theory is clarified

Enhanced understanding of infrared regularization in massive tensor fields

Abstract

Izawa's gauge-fixing procedure based on BRS symmetry is applied twice to the massive tensor field theory of Fierz-Pauli type. It is shown the second application can remove massless singularities which remain after the first application. Massless limit of the theory is discussed.