Journal Article

PUBDB-2025-01596

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Black holes as fermion factories

Chen, Y. (Corresponding author) ; Xue, X.DESY* ; Cardoso, V.

2025
IOP London

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Please use a persistent id in citations: doi:10.1088/1475-7516/2025/02/035  doi:10.3204/PUBDB-2025-01596

Report No.: DESY-23-109; arXiv:2308.00741

Abstract: Ultralight bosons near rotating black holes can undergo significant growth through superradiant energy extraction, potentially reaching field values close to the Planck scale and transforming black holes into effective transducers for these fields. The interaction between boson fields and fermions may lead to parametric production or Schwinger pair production of fermions, with efficiencies significantly exceeding those of perturbative decay processes. Additionally, the spatial gradients of scalar clouds and the electric components of vector clouds can accelerate fermions, resulting in observable fluxes. This study considers both Standard Model neutrinos and dark sector fermions, which could contribute to boosted dark matter. Energy loss due to fermion emissions can potentially quench the exponential growth of the cloud, leading to a saturated state. This dynamic provides a framework for establishing limits on boson-neutrino interactions, previously constrained by neutrino self-interaction considerations. In the saturation phase, boson clouds have the capacity to accelerate fermions to TeV energies, producing fluxes that surpass those from atmospheric neutrinos near black holes. These fluxes open new avenues for observations through high-energy neutrino detectors like IceCube, as well as through dark matter direct detection efforts focused on targeted black holes.

Keyword(s): scale: Planck ; neutrino: atmosphere ; neutrino: production ; neutrino: particle source ; scale: TeV ; field theory: scalar ; black hole ; superradiance ; saturation ; trigger ; transducer ; quenching ; parametric ; cloud ; boson: mass ; energy: yield ; neutrino: coupling ; acceleration ; flux ; astrophysical black holes ; gravity ; neutrino astronomy ; particle acceleration

Note: JCAP02(2025)035. 27 pages, 4 figures, published version in JCAP

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Contributing Institute(s):

1. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)
2. Gravitas - Black holes: gravitational engines of discovery (101052587) (101052587)
3. DFG project G:(GEPRIS)390833306 - EXC 2121: Quantum Universe (390833306) (390833306)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Chen, Y. (Corresponding author) ; Xue, X.DESY* ; Cardoso, V.
Black Holes as Neutrino Factories
[10.3204/PUBDB-2023-04449]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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