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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

Journal Article · · Journal of Cosmology and Astroparticle Physics
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This study 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.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
The IceCube, Pierre Auger and Telescope Array collaborations
Grant/Contract Number:
AC02-07CH11359; AC02-05CH11231
OSTI ID:
1454450
Alternate ID(s):
OSTI ID: 1244511
Report Number(s):
FERMILAB-PUB-15-520-AD-AE-CD-TD; arXiv:1511.09408; ark:/13030/qt93p5k25v; TRN: US1901020
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 01; Related Information: © 2016 IOP Publishing Ltd and Sissa Medialab srl.; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (6)

Multi-Messenger Physics With the Pierre Auger Observatory text January 2019
Russian–German Astroparticle Data Life Cycle Initiative text January 2018
Monitoring and Multi-Messenger Astronomy with IceCube journal March 2019
Russian–German Astroparticle Data Life Cycle Initiative text January 2018
Multi-Messenger Physics With the Pierre Auger Observatory journal April 2019
Monitoring and Multi-Messenger Astronomy with IceCube text January 2019

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
neutrino experiments
ultra high energy cosmic rays
cosmic ray experiments
neutrino astronomy