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Regular black hole cores via gravitational evanescence of collapsing matter

Antonio Panassiti*

  • INAF, Osservatorio Astrofisico di Catania, via S. Sofia 78, I-95123 Catania, Italy, Dipartimento di Fisica e Astronomia “Ettore Majorana,” Università di Catania, Via S. Sofia 64, 95123, Catania, Italy, and High Energy Physics Department, Institute of Mathematics, Astrophysics, and Particle Physics, Radboud University, Heyendalseweg 135, 6525 AJ Nijmegen, The Netherlands

  • *Contact author: antonio.panassiti@phd.unict.it
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Phys. Rev. D 113, 064057 – Published 26 March, 2026

DOI: https://doi.org/10.1103/fbz2-8n2h

Abstract

Modified Einstein’s equations implementing both an energy-dependent Newtonian and cosmological constant can be obtained via a modified action characterized by a nonminimal gravity-matter coupling. We show how different dynamics for the high energy regime—that nevertheless have in common the vanishing of the Newton constant—result in models of gravitational collapse which source the formation of nonsingular geometries with different types of asymptotic core: de Sitter, Minkowski, and with “steep pressure.” As we categorise their defining properties, one feature, which we prove to be actually independent of both the specific form of the nonminimal coupling and the equation of state of the collapsing fluid, stands out: the formation of a geometry with Minkowski core occurs only if the Newton constant, before finally vanishing, assumes negative values.

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See Also

Dust Collapse in Asymptotic Safety: A Path to Regular Black Holes

Alfio Bonanno, Daniele Malafarina, and Antonio Panassiti
Phys. Rev. Lett. 132, 031401 (2024)

Article Text

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Phys. Rev. D 113, 064057– Published 26 March, 2026
  • Received 21 October 2025
  • Accepted 6 March 2026
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