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Title: Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array

Abstract

This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and study their cross-correlation with the ultrahigh-energy cosmic ray (UHECR) samples as a function of angular separation. We also study their possible directional correlations using a likelihood method stacking the neutrino arrival directions and adopting different assumptions on the size of the UHECR magnetic deflections. Finally, we perform another likelihood analysis stacking the UHECR directions and using a sample of through-going muon tracks optimized for neutrino point-source searches with sub-degree angular resolution. No indications of correlations at discovery level are obtained for any of the searches performed. The smallest of the p-values comes from the search for correlation between UHECRs with IceCube high-energy cascades, a result that should continue to be monitored.

Authors:
; ;
Publication Date:
OSTI Identifier:
22525058
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 01; 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; ANGULAR CORRELATION; ASTROPHYSICS; COSMIC MUONS; COSMIC NEUTRINOS; COSMIC RAY DETECTION; COSMIC RAY FLUX; EEV RANGE; POINT SOURCES; RESOLUTION; TELESCOPES

Citation Formats

IceCube Collaboration, Pierre Auger Collaboration, and Telescope Array Collaboration. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/01/037.
IceCube Collaboration, Pierre Auger Collaboration, & Telescope Array Collaboration. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array. United States. doi:10.1088/1475-7516/2016/01/037.
IceCube Collaboration, Pierre Auger Collaboration, and Telescope Array Collaboration. Fri . "Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array". United States. doi:10.1088/1475-7516/2016/01/037.
@article{osti_22525058,
title = {Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array},
author = {IceCube Collaboration and Pierre Auger Collaboration and Telescope Array Collaboration},
abstractNote = {This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and study their cross-correlation with the ultrahigh-energy cosmic ray (UHECR) samples as a function of angular separation. We also study their possible directional correlations using a likelihood method stacking the neutrino arrival directions and adopting different assumptions on the size of the UHECR magnetic deflections. Finally, we perform another likelihood analysis stacking the UHECR directions and using a sample of through-going muon tracks optimized for neutrino point-source searches with sub-degree angular resolution. No indications of correlations at discovery level are obtained for any of the searches performed. The smallest of the p-values comes from the search for correlation between UHECRs with IceCube high-energy cascades, a result that should continue to be monitored.},
doi = {10.1088/1475-7516/2016/01/037},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2016,
place = {United States},
year = {2016},
month = {1}
}

Works referencing / citing this record:

Multi-Messenger Physics With the Pierre Auger Observatory
journal, April 2019

  • Kampert, Karl-Heinz; Alejandro Mostafa, Miguel; Zas, Enrique
  • Frontiers in Astronomy and Space Sciences, Vol. 6
  • DOI: 10.3389/fspas.2019.00024

Monitoring and Multi-Messenger Astronomy with IceCube
journal, March 2019