All-sky search for correlations in the arrival directions of astrophysical neutrino candidates and ultrahigh-energy cosmic rays

ICE CUBE COLLABORATION; PIERRE AUGER COLLABORATION; C. BONIFAZI; TELESCOPE ARRAY COLLABORATION

Conferencia; 35th International Cosmic Ray Conference; 2017

High-energy neutrinos, being neutral and weakly interacting particles, are powerful probes of thesites of production and acceleration of cosmic rays. The challenging discovery of cosmic neutrinosby the IceCube Collaboration has moved the field closer to realizing the potential of neutrinoastronomy. Meanwhile, ground-based cosmic ray detectors like the Pierre Auger Observatory andthe Telescope Array have reached an unprecedented accuracy in the determination of the featuresof the cosmic rays at the highest energies. We report on a collaborative effort between IceCube,the Pierre Auger Observatory and Telescope Array to identify directional correlations betweenthe arrival directions of the highest-energy cosmic rays from both hemispheres and of the mostprobable cosmic neutrino events detected by IceCube. We describe the updated results of twoindependent searches using seven years of IceCube neutrino data and the most energetic cosmicrayevents detected by the Pierre Auger Observatory and the Telescope Array. The directionalcorrelation found between UHECRs and neutrinos is reported with a significance of 2sigmas.