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Search for a correlation between the UHECRs measured by the pierre auger observatory and the telescope array and the neutrino candidate events from IceCube

par Christov, Asen;Tiniakov, Petr ;Unger, Michael;Golup, Geraldina;Aublin, Julien;Caccianiga, L.;Ghia, Piera P.L.;Montaruli, Teresa;Rameez, Mohamed;Roulet, Esteban;Sagawa, Hiroyuki
Référence Pos proceedings of science, 30-July-2015, 1082
Publication Publié, 2015

Article révisé par les pairs

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Résumé :

We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cascades 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 UHECRs is scanned over. The same events are also used in a separate search using a maximum likelihood approach, after the neutrino arrival directions are stacked. To estimate the significance we assume UHECR magnetic deflections to be inversely proportional to their energy, with values 3-, 6- and 9- 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 of through-going muon track events which were optimized for neutrino point-source searches.