Search for correlations of high-energy neutrinos and ultra-high-energy cosmic rays

Abstract

The IceCube Neutrino Observatory has recently found compelling evidence for a particular blazar producing high-energy neutrinos and $\mathrm{PeV}$ cosmic rays, however the sources of cosmic rays above several $\mathrm{EeV}$ remain unidentified. It is believed that the same environments that accelerate ultra-high-energy cosmic rays (UHECRs) also produce high-energy neutrinos via hadronic interactions of lower-energy cosmic rays. Two out of three joint analyses of the IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array yielded hints for a possible directional correlation of high-energy neutrinos and UHECRs. These hints however became less significant with more data. Recently, an improved analysis with an approach complementary to the other analyses has been developed. This analysis searches for neutrino point sources in the vicinity of UHECRs with search windows estimated from deflections by galactic magnetic fields. We present this new analysis method for searching common hadronic sources, additionally including neutrino data measured by ANTARES in order to increase the sensitivity to possible correlations in the Southern Hemisphere.

arXiv commentProceeding for the VLVnT-2018 Conference, 4 pages, 2 figures

References in corpus (4)

• Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert
• Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
• All-sky search for time-integrated neutrino emission from astrophysical sources with 7 years of IceCube data
• Searches for Anisotropies in the Arrival Directions of the Highest Energy Cosmic Rays Detected by the Pierre Auger Observatory

Cited by in corpus (5)

• IceCube Search for Neutrinos Coincident with Compact Binary Mergers from LIGO-Virgo's First Gravitational-Wave Transient Catalog
• A search for IceCube events in the direction of ANITA neutrino candidates
• Follow-up of astrophysical transients in real time with the IceCube Neutrino Observatory
• Search for Spatial Correlations of Neutrinos with Ultra-High-Energy Cosmic Rays
• Can astrophysical neutrinos trace the origin of the detected ultra-high energy cosmic rays?