Bowen Chen

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My name is Bowen Chen, a first-year physics Ph.D. student at Ohio State University. I earned my B.S. in Applied Physics at City University of Hong Kong and B.A. in Physics at Columbia University in May 2023. My current research interest is theoretical astrophysics and cosmology.

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1. Corrections to the Electron Spectrum of Hawking Radiation from Asteroid Mass Primordial Black Holes

Primordial black holes (PBHs) in the mass range of 10¹⁷–10²² grams are a compelling dark matter candidate. In this range, Hawking radiation provides strong constraints due to two key factors: (1) the Hawking temperatures are high enough to produce gamma rays and electron–positron pairs, and (2) a relatively large number of PBHs is needed to account for the full dark matter abundance.In addition to gamma-ray constraints, positrons emitted from PBHs can contribute to the 511 keV annihilation line, placing further limits on their abundance. To make precise predictions for high-energy observables, detailed quantum electrodynamics (QED) calculations are essential for modeling the electron–positron spectrum from Hawking radiation.

📄 Poster: “Corrections to the Electron Spectrum of Hawking Radiation from Asteroid-Mass Primordial Black Holes: Formalism and Numerical Evaluation of Dissipative Interactions”
Presented at the APS 2025 Global Summit