On the mass of the Universe born in a black hole

TL;DR

This paper proposes that our universe could have originated from the interior of an intermediate-mass black hole, formed through gravitational collapse of spin-fluid fermionic matter within a black hole, based on Einstein-Cartan theory.

Contribution

It introduces a model using Einstein-Cartan theory showing universe formation inside black holes of specific mass ranges, linking black hole collapse to universe creation.

Findings

A black hole of about 10^3 solar masses can produce a universe of about 10^26 solar masses.

The model connects black hole mass to the resulting universe's mass via spin-fluid fermionic matter.

Suggests our universe may have originated from an intermediate-mass black hole.

Abstract

It is shown, using the Einstein-Cartan-Sciama-Kibble theory of gravity, that gravitational collapse of spin-fluid fermionic matter with a stiff equation of state in a black hole of mass $M$ forms a new universe of mass $\sim M_\ast=M^2 m_n/m_\textrm{Pl}^2$, where $m_n$ is the mass of a neutron. Equaling $M_\ast$ to the mass of the Universe, which is about $10^{26}$ solar masses, gives $M\sim 10^3$ solar masses. Our Universe may thus have originated from the interior of an intermediate-mass black hole.