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.
| Original language | English |
|---|---|
| Article number | 37 |
| Journal | Journal of Cosmology and Astroparticle Physics |
| Volume | 2016 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2016 Jan 20 |
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Keywords
- cosmic ray experiments
- neutrino astronomy
- neutrino experiments
- ultra high energy cosmic rays
ASJC Scopus subject areas
- Astronomy and Astrophysics
Cite this
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. / The Pierre Auger Collaboration; The IceCube collaboration; The Telescope Array Collaboration.
In: Journal of Cosmology and Astroparticle Physics, Vol. 2016, No. 1, 37, 20.01.2016.Research output: Contribution to journal › Article
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TY - JOUR
T1 - 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
AU - The Pierre Auger Collaboration
AU - The IceCube collaboration
AU - The Telescope Array Collaboration
AU - Aartsen, M. G.
AU - Abraham, K.
AU - Ackermann, M.
AU - Adams, J.
AU - Aguilar, J. A.
AU - Ahlers, M.
AU - Ahrens, M.
AU - Altmann, D.
AU - Anderson, T.
AU - Ansseau, I.
AU - Archinger, M.
AU - Arguelles, C.
AU - Arlen, T. C.
AU - Auffenberg, J.
AU - Bai, X.
AU - Barwick, S. W.
AU - Baum, V.
AU - Bay, R.
AU - Beatty, J. J.
AU - Becker Tjus, J.
AU - Becker, K. H.
AU - Beiser, E.
AU - Berghaus, P.
AU - Berley, D.
AU - Bernardini, E.
AU - Bernhard, A.
AU - Besson, D. Z.
AU - Binder, G.
AU - Bindig, D.
AU - Bissok, M.
AU - Blaufuss, E.
AU - Blumenthal, J.
AU - Boersma, D. J.
AU - Bohm, C.
AU - Börner, M.
AU - Bos, F.
AU - Bose, D.
AU - Böser, S.
AU - Botner, O.
AU - Braun, J.
AU - Brayeur, L.
AU - Bretz, H. P.
AU - Buzinsky, N.
AU - Casey, J.
AU - Casier, M.
AU - Cheung, E.
AU - Chirkin, D.
AU - Christov, A.
AU - Clark, K.
AU - Ozawa, Shunsuke
PY - 2016/1/20
Y1 - 2016/1/20
N2 - 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.
AB - 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.
KW - cosmic ray experiments
KW - neutrino astronomy
KW - neutrino experiments
KW - ultra high energy cosmic rays
UR - http://www.scopus.com/inward/record.url?scp=84957795133&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84957795133&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2016/01/037
DO - 10.1088/1475-7516/2016/01/037
M3 - Article
VL - 2016
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 1
M1 - 37
ER -