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Searching non-standard interactions with atmospheric neutrinos at ESSnuSB
Consorcio ESS-bilbao, Parque Científico y Tecnológico de Bizkaia, Laida Bidea, Edificio 207-B, 48160, Derio, Bizkaia, Spain.
European Spallation Source, Box 176, SE-221 00, Lund, Sweden.
Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute, 10000, Zagreb, Croatia.
IPHC, Université de Strasbourg, CNRS/IN2P3, Strasbourg, France.
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2026 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2026, article id 109Article in journal (Refereed) Published
Abstract [en]

Atmospheric neutrinos provide a unique avenue to study neutrino interactions in matter. In this work, the prospects of constraining non-standard neutrino interactions with atmospheric neutrino oscillations are investigated for the proposed ESSnuSB far detector. By analyzing atmospheric neutrino samples equivalent to 5.4 Mt·year exposure, it is found that ESSnuSB could be able to set the upper bounds |ϵm| < 0.053,|ϵm| < 0.057,|ϵmµτ| < 0.021,ϵmee−ϵmµµ < 0.075 and |ϵmττ −ϵmµµ| < 0.031 at 90% CL, when the results are minimized for ϕmm and ϕmµτ and normal ordering is assumed for neutrino masses. It is also shown that the presence of non-standard interactions could affect the sensitivities to neutrino mass ordering and θ23 octant in comparison to the standard interaction scheme. The results of this work highlight the complementarity between atmospheric and accelerator neutrino programs in ESSnuSB.

Place, publisher, year, edition, pages
Springer Science and Business Media Deutschland GmbH , 2026. Vol. 2026, article id 109
Keywords [en]
Beyond Standard Model, Long-Baseline Neutrino Experiments, Oscillation
National Category
Subatomic Physics
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-117952DOI: 10.1007/JHEP05(2026)109ISI: 001766630500001Scopus ID: 2-s2.0-105039880985OAI: oai:DiVA.org:ltu-117952DiVA, id: diva2:2067605
Funder
EU, Horizon 2020, 860881-HIDDeN
Note

Full text license: CC BY 4.0;

Funder: European Union; Centre National de la Recherche Scientifique, France; Deutsche Forschungsgemeinschaft; Excellence Strategy of the Federal Government and the Länder, Germany; Ministry of Science and Education of Republic of Croatia (KK.01.1.1.01.0001); National Recovery and Resilience Plan of the Republic of Bulgaria; Roland Gustafssons Stiftelse för teoretisk fysik, Sweden;

ESSnuSB collaboration

Available from: 2026-06-08 Created: 2026-06-08 Last updated: 2026-06-08Bibliographically approved

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Saiang, David

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