High-Energy and Ultra-High-Energy Neutrinos from Primordial Black Holes

Abstract

Primordial Black Holes (PBHs) are capable of emitting extremely energetic particles independent of their interactions with the Standard Model. In this work, we investigate whether PBHs evaporating in the early universe could be responsible for some of the observed high-energy neutrinos above the TeV or PeV scale in the present universe. We compute the energy spectrum of neutrinos directly emitted by PBHs with a monochromatic mass function and estimate the wash-out point, which determines the maximum energy of the spectrum. We find that the spectrum generally extends to high energies following a power law of $E_{\nu }^{-3}$ until it reaches the wash-out point, which crucially depends on the PBH mass. For PBHs of $10^{13}$ grams, the spectrum can extend up to the PeV scale, though the flux is too low for detection. We also consider an indirect production mechanism involving dark particles that are emitted by PBHs and decay into neutrinos at a much later epoch. This mechanism allows lighter (such as those in the gram to kilogram range) PBHs to produce more energetic neutrino fluxes without being washed out by the thermal plasma in the early universe. In this scenario, we find that ultra-high-energy neutrinos around or above the EeV scale can be generated, with sufficiently high fluxes detectable by current and future high-energy neutrino observatories such as IceCube and GRAND.

25 pages, 4 figures; ; version accepted by JCAP

References in corpus (14)

• Cosmological constraints on exotic injection of electromagnetic energy
• Dark Matter in the Time of Primordial Black Holes
• Gravitational dark matter production: primordial black holes and UV freeze-in
• Bounds on warm dark matter from Schwarzschild primordial black holes
• Axion Dark Matter in the Time of Primordial Black Holes
• Baryogenesis, Primordial Black Holes and MHz-GHz Gravitational Waves
• The Primordial Black Holes that Disappeared: Connections to Dark Matter and MHz-GHz Gravitational Waves
• Recycled Dark Matter
• Limits on light primordial black holes from high-scale leptogenesis
• An Andean Deep-Valley Detector for High-Energy Tau Neutrinos
• Dark matter produced from right-handed neutrinos
• How dark is the ${\nu }_R$-philic dark photon?
• Ultraheavy Dark Matter and WIMPs Production aided by Primordial Black Holes
• Primordial black hole probes of heavy neutral leptons

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• No Hiding in the Dark: Cosmological Bounds on Heavy Neutral Leptons with Dark Decay Channels
• Primordial black holes as cosmic accelerators of light dark matter: Novel direct detection constraints
• Neutrino Emission and Plasma Heating from Primordial Black Holes: An Improved Approach to $N_{\mathrm{eff}}$ Constraints
• KM3-230213A and IceCube Neutrino Events from Metastable Dark Matter of Primordial Black Hole Origin
• Probing Bose-enhanced Inflaton Decay with Gravitational Waves
• Primordial high energy neutrinos: theoretical/observational constraints and sharp spectral features