M. G. Aartsen (Author), Andrej Filipčič (Author), Gašper Kukec Mezek (Author), J. P. Lundquist (Author), A. Saleh (Author), Samo Stanič (Author), M. Trini (Author), Darko Veberič (Author), Serguei Vorobiov (Author), Lili Yang (Author), Danilo Zavrtanik (Author), Marko Zavrtanik (Author)

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.

Keywords

nevtrini;kozmični žarki;ekstremne energije;observatoriji;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 539.1
COBISS: 4124923 Link will open in a new window
ISSN: 1475-7516
Views: 1939
Downloads: 0
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 1-33
Issue: ǂVol. ǂ2016
Chronology: Jan. 2016
DOI: 10.1088/1475-7516/2016/01/037
ID: 11605557