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
Date Issued
2016
Author(s)
IceCube Collaboration
•
Pierre Auger Collaboration
•
Telescope Array Collaboration
•
•
•
•
•
•
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.
Volume
2016
Issue
1
Start page
037
Issn Identifier
1475-7516
Ads BibCode
2016JCAP...01..037I
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
JCAP-doi 10.10881475-7516201601037.pdf
Description
postprint
Size
1.17 MB
Format
Adobe PDF
Checksum (MD5)
738153948ac4da924d1f1cb3d0b0f36f
Loading...
Name
The_IceCube_JCAP_2016_037.pdf
Description
[administrators only]
Size
2.87 MB
Format
Adobe PDF
Checksum (MD5)
280032dd867650cbe836ad4f4a466060