Document Type
Article
Publication Date
8-3-2022
Department
Department of Physics
Abstract
For several decades, the origin of ultra-high-energy cosmic rays (UHECRs) has been an unsolved question of high-energy astrophysics. One approach for solving this puzzle is to correlate UHECRs with high-energy neutrinos, since neutrinos are a direct probe of hadronic interactions of cosmic rays and are not deflected by magnetic fields. In this paper, we present three different approaches for correlating the arrival directions of neutrinos with the arrival directions of UHECRs. The neutrino data are provided by the IceCube Neutrino Observatory and ANTARES, while the UHECR data with energies above ∼50 EeV are provided by the Pierre Auger Observatory and the Telescope Array. All experiments provide increased statistics and improved reconstructions with respect to our previous results reported in 2015. The first analysis uses a high-statistics neutrino sample optimized for point-source searches to search for excesses of neutrino clustering in the vicinity of UHECR directions. The second analysis searches for an excess of UHECRs in the direction of the highest-energy neutrinos. The third analysis searches for an excess of pairs of UHECRs and highest-energy neutrinos on different angular scales. None of the analyses have found a significant excess, and previously reported overfluctuations are reduced in significance. Based on these results, we further constrain the neutrino flux spatially correlated with UHECRs.
Publication Title
Astrophysical Journal
Recommended Citation
Albert, A.,
Alves, S.,
André, M.,
Anghinolfi, M.,
Ardid, S.,
Aubert, J.,
Fick, B.,
Nitz, D.,
Puyleart, A.,
&
et. al.
(2022).
Search for Spatial Correlations of Neutrinos with Ultra-high-energy Cosmic Rays.
Astrophysical Journal,
934(2).
http://doi.org/10.3847/1538-4357/ac6def
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/16403
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
© 2022. The Author(s). Published by the American Astronomical Society. Publisher’s version of record: https://doi.org/10.3847/1538-4357/ac6def