Comment on "Spherically symmetric perturbations of a Schwarzschild black hole in torsion bigravity"

TL;DR

This paper offers a simplified derivation of the effective potential for spherically symmetric perturbations around Schwarzschild black holes in torsion bigravity, clarifying the reduction process and its uniqueness.

Contribution

It provides a more straightforward derivation of the effective potential in torsion bigravity and discusses the uniqueness of the reduction process.

Findings

Simplified derivation of the effective potential.

Discussion on the unicity of the reduction process.

Clarification of the methodology compared to previous work.

Abstract

The goal of this short note is to provide a simpler derivation of the effective potential surrounding a Schwarzschild black hole for spherically symmetric perturbations in the framework of torsion bigravity than the one presented in [V. Nikiforova, Spherically symmetric perturbations of a Schwarzschild black hole in torsion bigravity, Phys. Rev. D 104, 024032 (2021).]. We also discuss the unicity of the reduction process that leads to the potential.