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Identifying spin properties of evaporating black holes through asymmetric neutrino and photon emission

Perez-Gonzalez, Yuber F.

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Abstract

Kerr black holes radiate neutrinos in an asymmetric pattern, preferentially in the lower hemisphere relative to the black hole’s rotation axis, while antineutrinos are predominantly produced in the upper hemisphere. Leveraging this asymmetric emission, we explore the potential of high energy, Eν ≳ 1 TeV, neutrino, and antineutrino detection to reveal crucial characteristics of an evaporating primordial black hole at the time of its burst when observed near Earth. We improve upon previous calculations by carefully accounting for the nonisotropic particle emission, as Earth occupies a privileged angle relative to the black hole’s rotation axis. Additionally, we investigate the angular dependence of primary and secondary photon
spectra and assess the evaporating black hole’s time evolution during the final explosive stages of its lifetime. Since photon events outnumber neutrinos by about three orders of magnitude, we find that a neutrino measurement can aid in identifying the initial angular momentum and the black hole hemisphere facing Earth only for evaporating black holes within our solar system, at distances ≲10−4 pc, and observed during the final 100 s of their lifetime.

Citation

Perez-Gonzalez, Y. F. (2023). Identifying spin properties of evaporating black holes through asymmetric neutrino and photon emission. Physical Review D, 108, Article 083014. https://doi.org/10.1103/PhysRevD.108.083014

Journal Article Type Article
Acceptance Date Sep 20, 2023
Online Publication Date Oct 12, 2023
Publication Date 2023-10
Deposit Date Feb 6, 2024
Publicly Available Date Feb 6, 2024
Journal Physical Review D
Print ISSN 1550-7998
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 108
Article Number 083014
DOI https://doi.org/10.1103/PhysRevD.108.083014
Public URL https://durham-repository.worktribe.com/output/2227920

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