Measurement of the atmospheric νμ flux with six detection units of KM3NeT/ORCA

KM3NeT Collaboration

doi:10.1140/epjc/s10052-025-14513-2

Measurement of the atmospheric νμ flux with six detection units of KM3NeT/ORCA

KM3NeT Collaboration

Western Sydney University

North West University
University of Valencia
National Institute for Nuclear Physics
University of Rome La Sapienza
Université Paris Cité
National Institute for Subatomic Physics
University of Amsterdam
Khalifa University of Science and Technology
University of Campania Luigi Vanvitelli
Laboratoire Univers et Particules de Montpellier
CPPM
University of Genoa
Institut universitaire de France
CNRS/IN2P3
AGH University of Krakow
National Centre for Nuclear Research
Demokritos National Centre for Scientific Research
University of Catania
Mohammed V University in Rabat
Mohammed VI Polytechnic University
Ivane Javakhishvili Tbilisi State University
Czech Technical University in Prague
University of Bologna
Comenius University
Université catholique de Louvain
Mohamed I University
Friedrich-Alexander University Erlangen-Nürnberg
Centre for Space Research
E.A. Milne Centre for Astrophysics
University of Hull
School of Physics
University of the Witwatersrand

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Abstract

A measurement of the atmospheric νμ+ν¯μ flux with energies between 1 and 100 GeV is presented. The measurement has been performed using data taken with the first six detection units of the KM3NeT/ORCA detector, referred to as ORCA6. The data were collected between January 2020 and November 2021 and correspond to 510 days of livetime, with a total exposure of 433 kton·years. Using machine learning classification, 3894 neutrino candidate events have been selected with an atmospheric muon contamination of less than 1%. The atmospheric νμ+ν¯μ energy spectrum is derived using an unfolding procedure and the impact of systematic uncertainties is estimated. The atmospheric νμ+ν¯μ flux measured using the ORCA6 configuration is in agreement with the values measured by other experiments.

Original language	English
Article number	871
Journal	European Physical Journal C
Volume	85
Issue number	8
DOIs	https://doi.org/10.1140/epjc/s10052-025-14513-2
Publication status	Published - Aug 2025

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@article{9ebcf43cdbd1410593bfa8c8ed5ae08c,

title = "Measurement of the atmospheric νμ flux with six detection units of KM3NeT/ORCA",

abstract = "A measurement of the atmospheric νμ+ν¯μ flux with energies between 1 and 100 GeV is presented. The measurement has been performed using data taken with the first six detection units of the KM3NeT/ORCA detector, referred to as ORCA6. The data were collected between January 2020 and November 2021 and correspond to 510 days of livetime, with a total exposure of 433 kton·years. Using machine learning classification, 3894 neutrino candidate events have been selected with an atmospheric muon contamination of less than 1\%. The atmospheric νμ+ν¯μ energy spectrum is derived using an unfolding procedure and the impact of systematic uncertainties is estimated. The atmospheric νμ+ν¯μ flux measured using the ORCA6 configuration is in agreement with the values measured by other experiments.",

author = "KM3NeT Collaboration and N. Zywucka and J. Z{\'u}{\~n}iga and Zornoza, \{J. D.\} and D. Zito and A. Zegarelli and S. Zavatarelli and I. Lhenry-Yvon and \{de Wolf\}, E. and \{van Vliet\}, A. and D. Vivolo and S. Viola and A. Veutro and \{de Sola\}, \{F. Vazquez\} and G. Vasileiadis and G. Vannoye and \{Van Elewyck\}, V. and V. Valsecchi and A. Vacheret and A. Ukleja and E. Tzamariudaki and A. Tudorache and V. Tsourapis and B. Trocm{\'e} and \{Tosta e Melo\}, I. and S. Thoudam and H. Thiersen and Y. Tayalati and G. Takadze and M. Taiuti and I. {\v S}tekl and D. Stavropoulos and M. Spurio and B. Spisso and A. Sinopoulou and A. Simonelli and F. {\v S}imkovic and Y. Shitov and A. Sharma and R. Shanidze and I. Sgura and P. Sevle and N. Sennan and J. Seneca and Schutte, \{H. M.\} and J. Schumann and J. Schnabel and J. Robinson and Gibson, \{B. K.\} and Filipovi{\'c}, \{M. D.\} and A. Chen",

year = "2025",

month = aug,

doi = "10.1140/epjc/s10052-025-14513-2",

language = "English",

volume = "85",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "8",

}

TY - JOUR

T1 - Measurement of the atmospheric νμ flux with six detection units of KM3NeT/ORCA

AU - KM3NeT Collaboration

AU - Zywucka, N.

AU - Zúñiga, J.

AU - Zornoza, J. D.

AU - Zito, D.

AU - Zegarelli, A.

AU - Zavatarelli, S.

AU - Lhenry-Yvon, I.

AU - de Wolf, E.

AU - van Vliet, A.

AU - Vivolo, D.

AU - Viola, S.

AU - Veutro, A.

AU - de Sola, F. Vazquez

AU - Vasileiadis, G.

AU - Vannoye, G.

AU - Van Elewyck, V.

AU - Valsecchi, V.

AU - Vacheret, A.

AU - Ukleja, A.

AU - Tzamariudaki, E.

AU - Tudorache, A.

AU - Tsourapis, V.

AU - Trocmé, B.

AU - Tosta e Melo, I.

AU - Thoudam, S.

AU - Thiersen, H.

AU - Tayalati, Y.

AU - Takadze, G.

AU - Taiuti, M.

AU - Štekl, I.

AU - Stavropoulos, D.

AU - Spurio, M.

AU - Spisso, B.

AU - Sinopoulou, A.

AU - Simonelli, A.

AU - Šimkovic, F.

AU - Shitov, Y.

AU - Sharma, A.

AU - Shanidze, R.

AU - Sgura, I.

AU - Sevle, P.

AU - Sennan, N.

AU - Seneca, J.

AU - Schutte, H. M.

AU - Schumann, J.

AU - Schnabel, J.

AU - Robinson, J.

AU - Gibson, B. K.

AU - Filipović, M. D.

AU - Chen, A.

PY - 2025/8

Y1 - 2025/8

N2 - A measurement of the atmospheric νμ+ν¯μ flux with energies between 1 and 100 GeV is presented. The measurement has been performed using data taken with the first six detection units of the KM3NeT/ORCA detector, referred to as ORCA6. The data were collected between January 2020 and November 2021 and correspond to 510 days of livetime, with a total exposure of 433 kton·years. Using machine learning classification, 3894 neutrino candidate events have been selected with an atmospheric muon contamination of less than 1%. The atmospheric νμ+ν¯μ energy spectrum is derived using an unfolding procedure and the impact of systematic uncertainties is estimated. The atmospheric νμ+ν¯μ flux measured using the ORCA6 configuration is in agreement with the values measured by other experiments.

AB - A measurement of the atmospheric νμ+ν¯μ flux with energies between 1 and 100 GeV is presented. The measurement has been performed using data taken with the first six detection units of the KM3NeT/ORCA detector, referred to as ORCA6. The data were collected between January 2020 and November 2021 and correspond to 510 days of livetime, with a total exposure of 433 kton·years. Using machine learning classification, 3894 neutrino candidate events have been selected with an atmospheric muon contamination of less than 1%. The atmospheric νμ+ν¯μ energy spectrum is derived using an unfolding procedure and the impact of systematic uncertainties is estimated. The atmospheric νμ+ν¯μ flux measured using the ORCA6 configuration is in agreement with the values measured by other experiments.

UR - https://www.scopus.com/pages/publications/105014124467

U2 - 10.1140/epjc/s10052-025-14513-2

DO - 10.1140/epjc/s10052-025-14513-2

M3 - Article

AN - SCOPUS:105014124467

SN - 1434-6044

VL - 85

JO - European Physical Journal C

JF - European Physical Journal C

IS - 8

M1 - 871

ER -

Measurement of the atmospheric νμ flux with six detection units of KM3NeT/ORCA

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