In Search of the Spacetime Torsion

TL;DR

This paper reviews theoretical possibilities and experimental considerations regarding the role of spacetime torsion in gravity, highlighting the challenges in detecting it due to interpretational ambiguities.

Contribution

It analyzes two different theoretical approaches to spacetime torsion and discusses their experimental implications, providing a comparative perspective.

Findings

Torsion's role in gravity remains experimentally unconfirmed.

Different interpretations of torsion lead to varied experimental predictions.

The paper discusses the consistency of two torsion models.

Abstract

Whether torsion plays or not a role in the description of the gravitational interaction is a problem that can only be solved by experiment. This is, however, a difficult task: since there are different possible interpretations for torsion, there is no a model-independent way to look for it. In these notes, two different possibilities will be reviewed, their consistency analyzed, and the corresponding experimental outputs briefly discussed.