Measurement of All Flavor PeV Neutrino Flux using Combined Datasets from IceCube

The IceCube Neutrino Observatory has detected astrophysical neutrinos with energies ranging from a few TeV to multiple PeV. To extend the energy range beyond 10 PeV, we combine throughgoing tracks from the northern sky, high-energy starting tracks, contained cascades and uncontained cascades from the entire sky. This extension is critical for testing models that predict a common origin for ultra-high-energy cosmic rays (UHECRs) and neutrinos. We present our analysis, designed to achieve the highest sensitivity to the PeV neutrino flux through advanced modeling of atmospheric backgrounds, refined ice systematics, and improved energy resolution in event reconstructions enabled by a combination of machine learning and likelihood-based techniques.

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Publication Details

Published
2025-09-24
DOI
https://doi.org/10.22323/1.501.1217
Primary Topic
Astrophysics and Cosmic Phenomena
Type
article
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0.00

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Measurement of All Flavor PeV Neutrino Flux using Combined Datasets from IceCube

L. Schumacher, L. Köpke, Sofia Athanasiadou, Kiara Carloni et al.
Astrophysics and Cosmic Phenomena
article

Measurement of All Flavor PeV Neutrino Flux using Combined Datasets from IceCube

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article en

Abstract

The IceCube Neutrino Observatory has detected astrophysical neutrinos with energies ranging from a few TeV to multiple PeV. To extend the energy range beyond 10 PeV, we combine throughgoing tracks from the northern sky, high-energy starting tracks, contained cascades and uncontained cascades from the entire sky. This extension is critical for testing models that predict a common origin for ultra-high-energy cosmic rays (UHECRs) and neutrinos. We present our analysis, designed to achieve the highest sensitivity to the PeV neutrino flux through advanced modeling of atmospheric backgrounds, refined ice systematics, and improved energy resolution in event reconstructions enabled by a combination of machine learning and likelihood-based techniques.

National Science Foundation, U.S. Department of Energy, University of Wisconsin-Madison, Nvidia, Michigan State University, Villum Fonden, Polarforskningssekretariatet, Marquette University, Western Canada Research Grid, European Commission, National Research Foundation, Deutsche Forschungsgemeinschaft, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fonds De La Recherche Scientifique - FNRS, Belgian Federal Science Policy Office, Fonds Wetenschappelijk Onderzoek, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, RWTH Aachen University, Chiba University, Helmholtz Alliance for Astroparticle Physics, Alliance de recherche numérique du Canada, College of Engineering, Michigan State University, Natural Sciences and Engineering Research Council of Canada, Deutsches Elektronen-Synchrotron, Japan Society for the Promotion of Science, Marsden Fund, Institute for Global Prominent Research, Chiba University, Office of Polar Programs, Office of Advanced Cyberinfrastructure, Office of Experimental Program to Stimulate Competitive Research
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Astrophysics and Cosmic Phenomena
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