A new gravitational black-hole

TL;DR

This paper extends the Spinor Theory of Gravity by including self-interaction of a spinorial field, resulting in a new black-hole solution with multiple horizons, challenging the traditional Schwarzschild black-hole model.

Contribution

It introduces a self-interacting spinor field into the gravity model, leading to a novel black-hole solution with multiple horizons, advancing the theoretical understanding of gravitational interactions.

Findings

New black-hole solution with multiple horizons

Self-interacting spinor field alters gravitational metric

Comparison with Schwarzschild geometry shows distinct features

Abstract

In a recent paper we have analyzed the Spinor Theory of Gravity (STG) which is based on the intimate relation between Fermi (weak) interaction and gravity. We presented the hypothesis that the effect of matter upon the metric that represents gravitational interaction in General Relativity is an effective one. This lead us to consider gravitation to be the result of the interaction of two neutral spinorial fields (G-neutrinos) $\Psi_g$ and $\Omega_g$ with all kinds of matter and energy through the generation of such effective metric. In other words, the universal metric that represents gravitational interaction in the framework of General Relativity is constructed with the weak currents associated to $\Psi_g$ and $\Omega_g$. In the first paper we have shown that when only one spinor exists, the effective metric of a static and spherically symmetric configuration is identical to the Schwarzschild geometry of GR. In the present paper we go one step further and consider the case in which the field $\Psi_g$ has a self-interaction. The solution of a static and spherically symmetric configuration is distinct from the previous one. This new solution presents another horizon that we compare with the case of Schwarzschild.