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GR: Fachverband Gravitation, Relativistische Astrophysik und Kosmologie

GR 6: Black Holes I

GR 6.1: Talk

Tuesday, March 17, 2026, 16:15–16:30, KH 02.012

Interplay of evaporating black holes with BSM particle physics — •Jens Boos and Christoph Borschensky — Karlsruhe Institute of Technology

Evaporating black holes emit Hawking radiation. The precise radiation rate depends on (i) the geometrical backreaction, described by greybody factors, and (ii) the particle spectrum of the universe. We demonstrate that both aspects of modified gravity and beyond-the-standard model particle physics need to be taken into account to model a realistic black hole lifetime. In doing so, we outline the main corrections one thereby obtains to the emitted photon spectrum (including secondary photons) that is relevant to constrain the abundance of such evaporating black holes and links them to (a part of the) dark matter relic density.

Keywords: primordial black holes; Hawking radiation; observational constraints on dark matter