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arXiv · 2603.29024

Baryogenesis from Exploding Primordial Black Holes

Alexandra P. Klipfel·Miguel Vanvlasselaer·Sokratis Trifinopoulos·David I. Kaiser
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Abstract

Exploding primordial black holes can source baryon asymmetry soon after the electroweak phase transition, as high-energy Hawking radiation drives ultrarelativistic shocks in the surrounding plasma. The shocks and their trailing rarefaction waves delineate two bubble-like walls around a shell of superheated fluid, in which electroweak symmetry is restored. These moving interfaces source chiral charge, which is converted to baryon number. Upon adding a simple CP-violating operator at the TeV scale, this mechanism yields the observed baryon asymmetry with minimal dependence on PBH model parameters.

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Alexandra P. Klipfel, Miguel Vanvlasselaer, Sokratis Trifinopoulos, David I. Kaiser. 2026-03-30. Baryogenesis from Exploding Primordial Black Holes. https://arxiv.org/abs/2603.29024

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