Spinor Gravity

TL;DR

Spinor Gravity proposes a higher-dimensional spinor-based framework where gravity emerges as a composite metric, introducing torsion corrections and new gravitational particles, while remaining consistent with current observational tests.

Contribution

It introduces a novel spinor-based unification of interactions with a composite metric and explores implications of torsion and global Lorentz symmetry in gravity.

Findings

Schwarzschild and Friedman solutions remain unaffected at one loop.

The theory predicts new goldstone-boson-like gravitational particles.

It is compatible with all current observations of gravity.

Abstract

A unified description of all interactions could be based on a higher-dimensional theory involving only spinor fields. The metric arises as a composite object and the gravitational field equations contain torsion-corrections as compared to Einstein gravity. Lorentz symmetry in spinor space is only global, implying new goldstone-boson-like gravitational particles beyond the graviton. However, the Schwarzschild and Friedman solutions are unaffected at one loop order. Our generalized gravity seems compatible with all present observations.