Using neutron stars and primordial black holes to test theories of quantum gravity

TL;DR

This paper discusses three observational tests related to cosmological natural selection, a theory linked to quantum gravity, and evaluates their potential to refute the theory based on current and future astronomical observations.

Contribution

It introduces three observational tests for cosmological natural selection and assesses their effectiveness in falsifying the theory.

Findings

A pulsar with mass > 2.5 solar masses could refute the theory

Current knowledge does not refute the theory

Future observations of primordial black holes may test the theory

Abstract

Three observational tests of cosmological natural selection, a theory that follows from some hypotheses about quantum gravity, are described. If true, this theory explains the choices of the parameters of the standard model of particle physics. The first, the observation of a pulsar with mass greater than $2.5 M_\circ$, would cleanly refute the theory. The second and third, having to do with primordial black holes and early massive star formation, could do so given likely developments in the near future. However given present knowledge these arguments do not presently refute the theory. This shows that cosmological natural selection has not so far been refuted, in spite of being very vulnerable to falsification by possible observations.