title: Black hole mass threshold from nonsingular quantum gravitational collapse.
abstract: Quantum gravity is expected to remove the classical singularity that arises as the end state of gravitational collapse. To investigate this, we work with a toy model of a collapsing homogeneous scalar field. We show that nonperturbative semiclassical effects of loop quantum gravity cause a bounce and remove the black hole singularity. Furthermore, we find a critical threshold scale below which no horizon forms: quantum gravity may exclude very small astrophysical black holes.
authors.affiliation: Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, D-14476 Potsdam, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Bojowald
authors.forename: Rituparno
authors.initials: R
authors.lastname: Goswami
authors.forename: Roy
authors.initials: R
authors.lastname: Maartens
authors.forename: Parampreet
authors.initials: P
authors.lastname: Singh