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
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.
2016
2020-04-29 23:37:27
1033
UHECR, cosmic rays, neutrinos, multi-messenger physics, anisotropy
r6
M. G.
Aartsen
70
Jon Paul
Lundquist
70
COBISS_ID
3
4124923
DOI
15
10.1088/1475-7516/2016/01/037
NUK URN
18
URN:SI:UNG:REP:4GXWP3OQ
1475-7516_2016_01_037.pdf
2605795
Predstavitvena datoteka
2020-04-29 23:37:42
0
Izvorni URL
2020-04-29 23:37:29