Search for a correlation between the UHECRs measured by the Pierre Auger Observatory and the Telescope Array and the neutrino candidate events from IceCube

ICECUBE, AUGER AND TELESCOPE ARRAY, INCLUTE A E. ROULET

Congreso; ICRC; 2015

We have conducted three searches for correlations between ultra-high energy cosmic rays detectedby the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidateevents from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cas-cades from the IceCube ?high-energy starting events? sample and the other with 16 high-energy?track events?. The angular separation between the arrival directions of neutrinos and UHECRsis scanned over. The same events are also used in a separate search using a maximum likelihoodapproach, after the neutrino arrival directions are stacked. To estimate the significance we assumeUHECR magnetic deflections to be inversely proportional to their energy, with values 3 ◦ , 6 ◦ and9 ◦ at 100 EeV to allow for the uncertainties on the magnetic field strength and UHECR charge.A similar analysis is performed on stacked UHECR arrival directions and the IceCube sample ofthrough-going muon track events which were optimized for neutrino point-source searches.