KM3NeT/ARCA stacking search for high-energy neutrino point sources: the case of ultra-luminous infrared galaxies and blazars
Year: 2026
Type: preprint
Abstract: A stacking search for high-energy astrophysical neutrino emission is presented using three candidate source populations: ultra-luminous infrared galaxies and two categories of blazars, specifically high-synchrotron-peaked BL Lacs and extreme blazars. The analysis is based on 336 days of data from the Astroparticle Research with Cosmics in the Abyss component of the KM3NeT research infrastructure (KM3NeT/ARCA), collected with detector configurations comprising 19-21 detection units, yielding 1544 selected track-like neutrino candidates. The sample of ultra-luminous infrared galaxies consists of 75 sources, for which conventional power-law spectra are assumed in modelling their signal emission. The blazar samples comprise 232 high-synchrotron-peaked BL Lac objects and 88 extreme synchrotron-peaked emitters, respectively. Their expected neutrino fluxes are obtained from numerical tools constrained by multi-wavelength observational data. No statistically significant excess above the atmospheric background is found for the three catalogues and 90% confidence level upper limits are set.
Source: arXiv (Cornell University)
Author: The KM3NeT Collaboration
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Belgian American Educational Foundation, Arab Fund for Economic and Social Development, European Commission, Agence Nationale de la Recherche, Grantová Agentura České Republiky, Fundacja na rzecz Nauki Polskiej, Fonds De La Recherche Scientifique - FNRS, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Conseil Régional, Île-de-France, Khalifa University of Science, Technology and Research, Centre National de la Recherche Scientifique, Agentúra na Podporu Výskumu a Vývoja, Istituto Nazionale di Fisica Nucleare, Région Normandie, ESI Group, Ministero dell'Università e della Ricerca, HORIZON EUROPE Framework Programme, European Regional Development Fund, Agencia Estatal de Investigación, Labex UnivEarthS, Institut National de Physique Nucléaire et de Physique des Particules, H2020 European Research Council
Awards: G118516010, G1255325603, G1323502114, G1380551291, G1381093684, G1390965231, G1451311200, G1492508143, G1571383463, G1623744669, Towards full implementation of the KM3NeT Research Infrastructure, G1918719652, G2045273392, G2173752762, G2794008154, G2879720576, G304530541, G3382648788, G338497233, G3480869486, Skúmanie vlastností a interakcií neutrín pomocou reaktorových, atmosférických, astrofyzikálnych neutrín a atómového jadra, G3590787598, G3793059268, G4062681842, G4414191887, G4508498098, G4583304758, G4656594441, G4862615579, G5080475149, G5178665745, G5602316953, G57182573, G5752261212, G5955501538, G6033112984, G603588730, G6314331178, G6364395297, G6396871544, Astrophysics Center for Multimessenger studies in Europe, G6446818306, G6673606340, Mapping Highly-Energetic Messengers throughout the Universe, G675437911, G6874468849, G6948331134, Chemical Elements as Tracers of the Evolution of the Cosmos - Infrastructures for Nuclear Astrophysics, G701241157, G7084143925, G7167251299, G7232750373, G7240651115, G7376787254, G7731791180, G7799207878, G7830810647, G7845620010, G821608695, Demonstration of Ability to Establish the Mass Ordering of Neutrinos in the Sea, Université de Paris, Earth - Planets - Universe: observation, modeling, transfer, G8930446
OpenAlex ID: W7208710488