Joint Constraints on Galactic Diffuse Neutrino Emission from the ANTARES and IceCube Neutrino Telescopes

Author(s): Albert, A; Andre, M; Anghinolfi, M; Ardid, M; Aubert, JJ; Aublin, J; Avgitas, T; Baret, B; Barrios-Marti, J; Basa, S; Belhorma, B; Bertin, V; Biagi, S; Bormuth, R; Boumaaza, J; Bourret, S; Bouwhuis, MC; Brânzas, H; Bruijn, R; Brunner, J; Busto, J; Capone, A; Caramete, L; Carr, J; Celli, S; Chabab, M; El Moursli, RC; Chiarusi, T; Circella, M; Coelho, JAB; Coleiro, A; Colomer, M; Coniglione, R; Costantini, H; Coyle, P; Creusot, A; Diaz, AF; Deschamps, A; Distefano, C; Palma, ID; Domi, A; Donzaud, C; Dornic, D; Drouhin, D; Eberl, T; Bojaddaini, IE; Khayati, NE; Elsasser, D; Enzenhofer, A; Ettahiri, A; Fassi, F; Felis, I; Fermani, P; Ferrara, G; Fusco, L; Gay, P; Glotin, H; Gregoire, T; Ruiz, RG; Graf, K; Hallmann, S; Haren, HV; Heijboer, AJ; Hello, Y; Hernandez-Rey, JJ; Hosl, J; Hofestadt, J; Illuminati, G; James, CW; Jong, MD; Jongen, M; Kadler, M; Kalekin, O; Katz, U; Khan-Chowdhury, NR; Kouchner, A; Kreter, M; Kreykenbohm, I; Kulikovskiy, V; Lachaud, C; Lahmann, R; Lefevre, D | Abstract: © 2018. The American Astronomical Society. All rights reserved. The existence of diffuse Galactic neutrino production is expected from cosmic-ray interactions with Galactic gas and radiation fields. Thus, neutrinos are a unique messenger offering the opportunity to test the products of Galactic cosmic-ray interactions up to energies of hundreds of TeV. Here we present a search for this production using ten years of Astronomy with a Neutrino Telescope and Abyss environmental RESearch (ANTARES) track and shower data, as well as seven years of IceCube track data. The data are combined into a joint likelihood test for neutrino emission according to the KRAg model assuming a 5 PeV per nucleon Galactic cosmic-ray cutoff. No significant excess is found. As a consequence, the limits presented in this Letter start constraining the model parameter space for Galactic cosmic-ray production and transport.