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.
Search for a correlation between the UHECRs measured by the pierre auger observatory and the telescope array and the neutrino candidate events from IceCube / A. Christov, G. Golup, J. Aublin, L. Caccianiga, P.L. Ghia, T. Montaruli, M. Rameez, E. Roulet, H. Sagawa, P. Tinyakov, M. Unger. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 30:(2015). ((Intervento presentato al convegno 34th International Cosmic Ray Conference tenutosi a The Hague nel 2015.
Search for a correlation between the UHECRs measured by the pierre auger observatory and the telescope array and the neutrino candidate events from IceCube
L. Caccianiga;
2015
Abstract
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.Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.