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    All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data

    Access Status
    Fulltext not available
    Authors
    Albert, A.
    André, M.
    Anghinolfi, M.
    Anton, G.
    Ardid, M.
    Aubert, J.
    Aublin, J.
    Avgitas, T.
    Baret, B.
    Barrios-Marti, J.
    Basa, S.
    Belhorma, B.
    Bertin, V.
    Biagi, S.
    Bormuth, R.
    Bourret, S.
    Bouwhuis, M.
    Branzas, H.
    Bruijn, R.
    Brunner, J.
    Busto, J.
    Capone, A.
    Caramete, L.
    Carr, J.
    Celli, S.
    El Moursli, R.
    Chiarusi, T.
    Circella, M.
    Coelho, J.
    Coleiro, A.
    Coniglione, R.
    Costantini, H.
    Coyle, P.
    Creusot, A.
    Diaz, A.
    Deschamps, A.
    Bonis, G.
    Distefano, C.
    Palma, I.
    Domi, A.
    Donzaud, C.
    Dornic, D.
    Drouhin, D.
    Eberl, T.
    Bojaddaini, I.
    Khayati, N.
    Elsasser, D.
    Enzenhöfer, A.
    Ettahiri, A.
    Fassi, F.
    Felis, I.
    Fusco, L.
    Gay, P.
    Giordano, V.
    Glotin, H.
    Grégoire, T.
    Ruiz, R.
    Graf, K.
    Hallmann, S.
    Haren, H.
    Heijboer, A.
    Hello, Y.
    Hernández-Rey, J.
    Hößl, J.
    Hofestadt, J.
    Illuminati, G.
    James, Clancy
    Jong, M.
    Jongen, M.
    Kadler, M.
    Kalekin, O.
    Katz, U.
    Kießling, D.
    Kouchner, A.
    Kreter, M.
    Kreykenbohm, I.
    Kulikovskiy, V.
    Lachaud, C.
    Lahmann, R.
    Lefevre, D.
    Leonora, E.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Albert, A. and André, M. and Anghinolfi, M. and Anton, G. and Ardid, M. and Aubert, J. and Aublin, J. et al. 2018. All-flavor Search for a Diffuse Flux of Cosmic Neutrinos with Nine Years of ANTARES Data. Astrophysical Journal Letters. 853 (1).
    Source Title
    Astrophysical Journal Letters
    DOI
    10.3847/2041-8213/aaa4f6
    ISSN
    2041-8205
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/73220
    Collection
    • Curtin Research Publications
    Abstract

    The ANTARES detector is at present the most sensitive neutrino telescope in the northern hemisphere. The highlysignificant cosmic neutrino excess observed by the Antarctic IceCube detector can be studied with ANTARES,exploiting its complementing field of view, exposure, and lower energy threshold. Searches for an all-flavor diffuseneutrino signal, covering nine years of ANTARES data taking, are presented in this Letter. Upward-going eventsare used to reduce the atmospheric muon background. This work includes for the first time in ANTARES bothtrack-like (mainly nm) and shower-like (mainly ne) events in this kind of analysis. Track-like events allow for anincrease of the effective volume of the detector thanks to the long path traveled by muons in rock and/or sea water.Shower-like events are well reconstructed only when the neutrino interaction vertex is close to, or inside, theinstrumented volume. A mild excess of high-energy events over the expected background is observed in nine yearsof ANTARES data in both samples. The best fit for a single power-law cosmic neutrino spectrum, in terms of perflavorflux at 100 TeV, is f01f100 TeV (1.7±1.0) × 10-18GeV-1 cm-2 s-1 sr-1 with spectral index ?=2.4-0.4+0.5. The null cosmic flux assumption is rejected with a significance of 1.6d.

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