Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES

Albert A, Alves S, André M, Ardid M, Ardid S, Aubert JJ, Aublin J, Baret B, Basa S, Becherini Y, Belhorma B, Bendahman M, Benfenati F, Bertin V, Biagi S, Bissinger M, Boumaaza J, Bouta M, Bouwhuis MC, Brânzaş H, Bruijn R, Brunner J, Busto J, Caiffi B, Calvo D, Campion S, Capone A, Caramete L, Carenini F, Carr J, Carretero V, Celli S, Cerisy L, Chabab M, Chau TN, Cherkaoui El Moursli R, Chiarusi T, Circella M, Coelho JA, Coleiro A, Coniglione R, Coyle P, Creusot A, Díaz AF, De Martino B, Distefano C, Di Palma I, Domi A, Donzaud C, Dornic D, Drouhin D, Eberl T, van Eeden T, van Eijk D, El Hedri S, El Khayati N, Enzenhöfer A, Fasano M, Fermani P, Ferrara G, Filippini F, Fusco L, Gagliardini S, García J, Gatius Oliver C, Gay P, Geißelbrecht N, Glotin H, Gozzini R, Gracia Ruiz R, Graf K, Guidi C, Haegel L, Hallmann S, van Haren H, Heijboer AJ, Hello Y, Hernández-Rey JJ, Hößl J, Hofestädt J, Huang F, Illuminati G, James CW, Jisse-Jung B, de Jong M, de Jong P, Kadler M, Kalekin O, Katz U, Kouchner A, Kreykenbohm I, Kulikovskiy V, Lahmann R, Lamoureux M, Lazo A, Lefèvre D, Leonora E, Levi G, Le Stum S, Lopez-Coto D, Loucatos S, Maderer L, Manczak J, Marcelin M, Margiotta A, Marinelli A, Martínez-Mora JA, Migliozzi P, Moussa A, Muller R, Nauta L, Navas S, Neronov A, Nezri E, Ó Fearraigh B, Păun A, Păvălaş GE, Perrin-Terrin M, Pestel V, Piattelli P, Poirè C, Popa V, Pradier T, Randazzo N, Real D, Reck S, Riccobene G, Romanov A, Sánchez-Losa A, Saina A, Salesa Greus F, Samtleben DF, Sanguineti M, Sapienza P, Savchenko D, Schnabel J, Schumann J, Schüssler F, Seneca J, Spurio M, Stolarczyk T, Taiuti M, Tayalati Y, Tingay SJ, Vallage B, Vannoye G, Van Elewyck V, Viola S, Vivolo D, Wilms J, Zavatarelli S, Zegarelli A, Zornoza JD, Zúñiga J (2023)

Publication Type: Journal article, Original article

Publication year: 2023

Journal

Book Volume: 841

Article Number: 137951

DOI: 10.1016/j.physletb.2023.137951

Abstract

Interactions of cosmic ray protons, atomic nuclei, and electrons in the interstellar medium in the inner part of the Milky Way produce a γ-ray flux from the Galactic Ridge. If the γ-ray emission is dominated by proton and nuclei interactions, a neutrino flux comparable to the γ-ray flux is expected from the same sky region. Data collected by the ANTARES neutrino telescope are used to constrain the neutrino flux from the Galactic Ridge in the 1-100 TeV energy range. Neutrino events reconstructed both as tracks and showers are considered in the analysis and the selection is optimized for the search of an excess in the region |l|<30°, |b|<2°. The expected background in the search region is estimated using an off-zone region with similar sky coverage. Neutrino signal originating from a power-law spectrum with spectral index ranging from Γν=1 to 4 is simulated in both channels. The observed energy distributions are fitted to constrain the neutrino emission from the Ridge. The energy distributions in the signal region are inconsistent with the background expectation at ∼96% confidence level. The mild excess over the background is consistent with a neutrino flux with a power law with a spectral index 2.45−0.34^+0.22 and a flux normalization [Formula presented] GeV⁻¹ cm⁻² s⁻¹ sr⁻¹ at 40 TeV reference energy. Such flux is consistent with the expected neutrino signal if the bulk of the observed γ-ray flux from the Galactic Ridge originates from interactions of cosmic ray protons and nuclei with a power-law spectrum extending well into the PeV energy range.

Authors with CRIS profile

Involved external institutions

National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) Polytechnic University of Valencia / Universidad Politécnica de Valencia Spain (ES) University of València / Universitat de València Spain (ES) FOM Foundation Netherlands (NL) Universidad de Granada Spain (ES) University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot France (FR) Aix-Marseille University / Aix-Marseille Université France (FR) Royal Netherlands Institute for Sea Research (NIOZ) Netherlands (NL) International Centre for Radio Astronomy Research Australia (AU) Julius-Maximilians-Universität Würzburg Germany (DE) Mohammed V University (UMVA) / جامعة محمد الخامس‎ Morocco (MA) Mediterranean Institute of Oceanography (MIO) / Institut méditerranéen d'océanologie France (FR) Mohammed First University / Université Mohammed Premier / جامعة محمد الأول Morocco (MA) Université de Strasbourg (UDS) France (FR) UMR Géoazur - Campus Azur du CNRS France (FR) Polytechnic University of Catalonia / Universitat Politècnica de Catalunya · BarcelonaTech (UPC) / Universidad Politécnica de Cataluña Spain (ES) National Center for Energy Science & Nuclear Technology Morocco (MA) National Institute for Laser, Plasma & Radiation Physics (INFLPR) Romania (RO) Cadi Ayyad University / جامعة القاضي عياض‎ Morocco (MA) Università degli Studi di Salerno Italy (IT) Institute of Research into the Fundamental Laws of the Universe / Institut de recherche sur les lois fondamentales de l'univers (IRFU) France (FR)

How to cite

APA:

Albert, A., Alves, S., André, M., Ardid, M., Ardid, S., Aubert, J.J.,... Zúñiga, J. (2023). Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES. Physics Letters B, 841. https://doi.org/10.1016/j.physletb.2023.137951

MLA:

Albert, A., et al. "Hint for a TeV neutrino emission from the Galactic Ridge with ANTARES." Physics Letters B 841 (2023).

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