Constraints on UHECR characteristics from cosmogenic neutrino limits with the measurements of the Pierre Auger Observatory - INSPIRE

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Constraints on UHECR characteristics from cosmogenic neutrino limits with the measurements of the Pierre Auger Observatory

Pierre Auger

Collaboration

Jul 25, 2023

13 pages

Published in:

PoS ICRC2023 (2023) 1520

Contribution to:

- ICRC2023
, 1520

Published: Jul 25, 2023

DOI:

10.22323/1.444.1520

Experiments:

AUGER

reference search6 citations

Citations per year

Abstract: (SISSA)

Cosmogenic neutrinos are expected to originate in the extragalactic propagation of ultra-high-energy cosmic rays (UHECRs), as a result of their interactions with background photons. Due to these reactions, the visible Universe in UHECRs is more limited than in neutrinos, which instead could reach us without interacting after traveling cosmological distances. In this contribution, we exploit a multimessenger approach by computing the expected energy spectrum and mass composition of UHECRs at Earth corresponding to combinations of spectral parameters and mass composition at their sources, as well as parameters related to the UHECR source distribution, and by determining, at the same time, the associated cosmogenic neutrino fluxes. By comparing the expected UHECR observables to the energy spectrum and mass composition measured at the Pierre Auger Observatory above

10^{17.8}

eV and the expected neutrino fluxes to the most updated neutrino limits, we can constrain the parameter space of the properties of the potential sources of UHECRs, such as their cosmological evolution and maximum redshift. In addition, the fraction of protons compatible with the data is also investigated in terms of expected neutrino fluxes.

cosmic radiation: UHE
mass spectrum: measured
photon: background
observatory
Auger
spectral
multimessenger
redshift
propagation
cosmic radiation: flux

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Figures(0)

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