New Constraints on all flavour Galactic diffuse neutrino emission with the ANTARES telescope
Abstract
The flux of very high-energy neutrinos produced in our Galaxy by the interaction of accelerated cosmic rays with the interstellar medium is not yet determined. The characterization of this flux will shed light on Galactic accelerator features, gas distribution morphology and Galactic cosmic ray transport. The central Galactic plane can be the site of an enhanced neutrino production, thus leading to anisotropies in the extraterrestrial neutrino signal as measured by the IceCube Collaboration. The ANTARES neutrino telescope, located in the Mediterranean Sea, offers a favourable view on this part of the sky, thereby allowing for a contribution to the determination of this flux. The expected diffuse Galactic neutrino emission can be obtained linking a model of generation and propagation of cosmic rays with the morphology of the gas distribution in the Milky Way. In this paper, the so-called "Gamma model" introduced recently to explain the high-energy gamma ray diffuse Galactic emission, is assumed as reference. The neutrino flux predicted by the "Gamma model" depends of the assumed primary cosmic ray spectrum cut-off. Considering a radially-dependent diffusion coefficient, this proposed scenario is able to account for the local cosmic ray measurements, as well as for the Galactic gamma ray observations. Nine years of ANTARES data are used in this work to search for a possible Galactic contribution according to this scenario. All flavour neutrino interactions are considered. No excess of events is observed and an upper limit is set on the neutrino flux of () times the prediction of the "Gamma model" assuming the primary cosmic ray spectrum cut-off at 5 (50) PeV. This limit excludes the diffuse Galactic neutrino emission as the major cause of the "spectral anomaly" between the two hemispheres measured by IceCube.
Keywords
Cite
@article{arxiv.1705.00497,
title = {New Constraints on all flavour Galactic diffuse neutrino emission with the ANTARES telescope},
author = {A. Albert and M. André and M. Anghinolfi and G. Anton and M. Ardid and J. -J. Aubert and T. Avgitas and B. Baret and J. Barrios-Martí and S. Basa and B. Belhorma and V. Bertin and S. Biagi and R. Bormuth and S. Bourret and M. C. Bouwhuis and R. Bruijn and J. Brunner and J. Busto and A. Capone and L. Caramete and J. Carr and S. Celli and R. Cherkaoui El Moursli and T. Chiarusi and M. Circella and J. A. B. Coelho and A. Coleiro and R. Coniglione and H. Costantini and P. Coyle and A. Creusot and A. F. Díaz and A. Deschamps and G. De Bonis and C. Distefano and I. Di Palma and A. Domi and C. Donzaud and D. Dornic and D. Drouhin and T. Eberl and I. El Bojaddaini and N. El Khayati and D. Elsässer and A. Enzenhöfer and A. Ettahiri and F. Fassi and I. Felis and L. A. Fusco and S. Galatà and P. Gay and V. Giordano and H. Glotin and T. Grégoire and R. Gracia Ruiz and K. Graf and S. Hallmann and H. van Haren and A. J. Heijboer and Y. Hello and J. J. Hernández-Rey and J. Hößl and J. Hofestädt and C. Hugon and G. Illuminati and C. W. James and M. de Jong and M. Jongen and M. Kadler and O. Kalekin and U. Katz and D. Kießling and A. Kouchner and M. Kreter and I. Kreykenbohm and V. Kulikovskiy and C. Lachaud and R. Lahmann and D. Lefèvre and E. Leonora and M. Lotze and S. Loucatos and M. Marcelin and A. Margiotta and A. Marinelli and J. A. Martínez-Mora and R. Mele and K. Melis and T. Michael and P. Migliozzi and A. Moussa and S. Navas and E. Nezri and M. Organokov and G. E. Păvălaş and C. Pellegrino and C. Perrina and P. Piattelli and V. Popa and T. Pradier and L. Quinn and C. Racca and G. Riccobene and A. Sánchez-Losa and M. Saldaña and I. Salvadori and D. F. E. Samtleben and M. Sanguineti and P. Sapienza and F. Schüssler and C. Sieger and M. Spurio and Th. Stolarczyk and M. Taiuti and Y. Tayalati and A. Trovato and D. Turpin and C. Tönnis and B. Vallage and V. Van Elewyck and F. Versari and D. Vivolo and A. Vizzoca and J. Wilms and J. D. Zornoza and J. Zúñiga and D. Gaggero and D. Grasso},
journal= {arXiv preprint arXiv:1705.00497},
year = {2017}
}
Comments
8 pages, 3 figures, 1 table