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Title: Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV

Abstract

While propagating from their source to the observer, ultrahigh energy cosmic rays interact with cosmological photon backgrounds and generate to the so-called ''cosmogenic neutrinos''. Here we study the parameter space of the cosmogenic neutrino flux given recent cosmic ray data and updates on plausible source evolution models. The shape and normalization of the cosmogenic neutrino flux are very sensitive to some of the current unknowns of ultrahigh energy cosmic ray sources and composition. We investigate various chemical compositions and maximum proton acceleration energies E{sub p,max} which are allowed by current observations. We consider different models of source evolution in redshift and three possible scenarios for the Galactic to extragalactic transition. We summarize the parameter space for cosmogenic neutrinos into three regions: an optimistic scenario that is currently being constrained by observations, a plausible range of models in which we base many of our rate estimates, and a pessimistic scenario that will postpone detection for decades to come. We present the implications of these three scenarios for the detection of cosmogenic neutrinos from PeV to ZeV (10{sup 14−21} eV) with the existing and upcoming instruments. In the plausible range of parameters, the narrow flux variability in the EeV energy region assuresmore » low but detectable rates for IceCube (0.06–0.2 neutrino per year) and the Pierre Auger Observatory (0.03–0.06 neutrino per year), and detection should happen in the next decade. If EeV neutrinos are detected, PeV information can help select between competing models of cosmic ray composition at the highest energy and the Galactic to extragalactic transition at ankle energies. With improved sensitivity, ZeV neutrino observatories, such as ANITA and JEM-EUSO could explore and place limits on the maximum acceleration energy.« less

Authors:
;  [1]
  1. Department of Astronomy and Astrophysics, Enrico Fermi Institute, and Kavli Institute for Cosmological Physics, The University of Chicago, 5640 S. Ellis Ave, Chicago, IL 60637 (United States)
Publication Date:
OSTI Identifier:
22275346
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2010; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COSMIC NEUTRINOS; COSMIC RAY PROPAGATION; COSMIC RAY SOURCES; COSMOLOGY; EEV RANGE; EV RANGE; MILKY WAY; PEV RANGE; RED SHIFT; SENSITIVITY; SPACE

Citation Formats

Kotera, K., Olinto, A. V., and Allard, D., E-mail: kotera@uchicago.edu, E-mail: allard@apc.univ-paris7.fr, E-mail: olinto@kicp.uchicago.edu. Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV. United States: N. p., 2010. Web. doi:10.1088/1475-7516/2010/10/013.
Kotera, K., Olinto, A. V., & Allard, D., E-mail: kotera@uchicago.edu, E-mail: allard@apc.univ-paris7.fr, E-mail: olinto@kicp.uchicago.edu. Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV. United States. https://doi.org/10.1088/1475-7516/2010/10/013
Kotera, K., Olinto, A. V., and Allard, D., E-mail: kotera@uchicago.edu, E-mail: allard@apc.univ-paris7.fr, E-mail: olinto@kicp.uchicago.edu. Fri . "Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV". United States. https://doi.org/10.1088/1475-7516/2010/10/013.
@article{osti_22275346,
title = {Cosmogenic neutrinos: parameter space and detectabilty from PeV to ZeV},
author = {Kotera, K. and Olinto, A. V. and Allard, D., E-mail: kotera@uchicago.edu, E-mail: allard@apc.univ-paris7.fr, E-mail: olinto@kicp.uchicago.edu},
abstractNote = {While propagating from their source to the observer, ultrahigh energy cosmic rays interact with cosmological photon backgrounds and generate to the so-called ''cosmogenic neutrinos''. Here we study the parameter space of the cosmogenic neutrino flux given recent cosmic ray data and updates on plausible source evolution models. The shape and normalization of the cosmogenic neutrino flux are very sensitive to some of the current unknowns of ultrahigh energy cosmic ray sources and composition. We investigate various chemical compositions and maximum proton acceleration energies E{sub p,max} which are allowed by current observations. We consider different models of source evolution in redshift and three possible scenarios for the Galactic to extragalactic transition. We summarize the parameter space for cosmogenic neutrinos into three regions: an optimistic scenario that is currently being constrained by observations, a plausible range of models in which we base many of our rate estimates, and a pessimistic scenario that will postpone detection for decades to come. We present the implications of these three scenarios for the detection of cosmogenic neutrinos from PeV to ZeV (10{sup 14−21} eV) with the existing and upcoming instruments. In the plausible range of parameters, the narrow flux variability in the EeV energy region assures low but detectable rates for IceCube (0.06–0.2 neutrino per year) and the Pierre Auger Observatory (0.03–0.06 neutrino per year), and detection should happen in the next decade. If EeV neutrinos are detected, PeV information can help select between competing models of cosmic ray composition at the highest energy and the Galactic to extragalactic transition at ankle energies. With improved sensitivity, ZeV neutrino observatories, such as ANITA and JEM-EUSO could explore and place limits on the maximum acceleration energy.},
doi = {10.1088/1475-7516/2010/10/013},
url = {https://www.osti.gov/biblio/22275346}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2010,
place = {United States},
year = {2010},
month = {10}
}