Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA

the KM3NeT Collaboration

doi:10.1007/JHEP10(2024)206

Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA

the KM3NeT Collaboration

Physics

National Institute for Nuclear Physics
Université de Strasbourg
Université de Haute-Alsace
Khalifa University of Science and Technology
Aix-Marseille Université
University of Valencia
University of Naples Federico II
Polytechnic University of Catalonia
Nantes Université
Polytechnic University of Valencia
Mohammed V University in Rabat
Université de Paris
University of Genoa
Université de Caen
Czech Technical University in Prague
Comenius University
University of Bologna
University of Campania Luigi Vanvitelli
LPC
University of Hull
National Institute for Subatomic Physics
North West University
Badji Mokhtar University
University of Salerno
Institute for Space Sciences
University of Amsterdam
Netherlands Organisation for Applied Scientific Research
University of Rome La Sapienza
Cadi Ayyad University
University of the Witwatersrand
University of Catania
Université catholique de Louvain
University of Granada
Friedrich-Alexander University Erlangen-Nürnberg
Demokritos National Centre for Scientific Research
Mohamed I University
Western Sydney University
Royal Netherlands Institute for Sea Research - NIOZ
Leiden University
Ivane Javakhishvili Tbilisi State University
The University of Georgia, Tbilisi
Institut universitaire de France
Max Planck Institute for Radio Astronomy
Harvard University
Mohammed VI Polytechnic University
National Centre for Nuclear Research
Université Montpellier 2

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on an initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photo-sensors. A high-purity neutrino sample was extracted, corresponding to an exposure of 433 kton-years. The sample of 5828 neutrino candidates is analysed following a binned log-likelihood method in the reconstructed energy and cosine of the zenith angle. The atmospheric oscillation parameters are measured to be sin²θ₂₃=0.51_−0.05^+0.04, and Δm₃₁²=2.18_−0.35^+0.25×10⁻³eV²∪−2.25−1.76×10⁻³ eV² at 68% CL. The inverted neutrino mass ordering hypothesis is disfavoured with a p-value of 0.25.

Original language	English
Article number	206
Journal	Journal of High Energy Physics
Volume	2024
Issue number	10
DOIs	https://doi.org/10.1007/JHEP10(2024)206
Publication status	Published - Oct 2024

Keywords

Neutrino Detectors and Telescopes (experiments)
Oscillation

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1007/JHEP10(2024)206

Cite this

@article{f0823d61c0be4a308acebf0e70ec9321,

title = "Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA",

abstract = "KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on an initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photo-sensors. A high-purity neutrino sample was extracted, corresponding to an exposure of 433 kton-years. The sample of 5828 neutrino candidates is analysed following a binned log-likelihood method in the reconstructed energy and cosine of the zenith angle. The atmospheric oscillation parameters are measured to be sin2θ23=0.51−0.05+0.04, and Δm312=2.18−0.35+0.25×10−3eV2∪−2.25−1.76×10−3 eV2 at 68\% CL. The inverted neutrino mass ordering hypothesis is disfavoured with a p-value of 0.25.",

keywords = "Neutrino Detectors and Telescopes (experiments), Oscillation",

author = "\{the KM3NeT Collaboration\} and S. Aiello and A. Albert and Alhebsi, \{A. R.\} and M. Alshamsi and \{Alves Garre\}, S. and A. Ambrosone and F. Ameli and M. Andre and L. Aphecetche and M. Ardid and S. Ardid and H. Atmani and J. Aublin and F. Badaracco and L. Bailly-Salins and Z. Barda{\v c}ov{\'a} and B. Baret and A. Bariego-Quintana and Y. Becherini and M. Bendahman and F. Benfenati and M. Benhassi and M. Bennani and Benoit, \{D. M.\} and E. Berbee and V. Bertin and S. Biagi and M. Boettcher and D. Bonanno and Bouasla, \{A. B.\} and J. Boumaaza and M. Bouta and M. Bouwhuis and C. Bozza and Bozza, \{R. M.\} and H. Br{\^a}nza{\c s} and F. Bretaudeau and M. Breuhaus and R. Bruijn and J. Brunner and R. Bruno and E. Buis and R. Buompane and J. Busto and B. Caiffi and D. Calvo and A. Capone and F. Carenini and V. Carretero and S. Razzaque",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = oct,

doi = "10.1007/JHEP10(2024)206",

language = "English",

volume = "2024",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "10",

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TY - JOUR

T1 - Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA

AU - the KM3NeT Collaboration

AU - Aiello, S.

AU - Albert, A.

AU - Alhebsi, A. R.

AU - Alshamsi, M.

AU - Alves Garre, S.

AU - Ambrosone, A.

AU - Ameli, F.

AU - Andre, M.

AU - Aphecetche, L.

AU - Ardid, M.

AU - Ardid, S.

AU - Atmani, H.

AU - Aublin, J.

AU - Badaracco, F.

AU - Bailly-Salins, L.

AU - Bardačová, Z.

AU - Baret, B.

AU - Bariego-Quintana, A.

AU - Becherini, Y.

AU - Bendahman, M.

AU - Benfenati, F.

AU - Benhassi, M.

AU - Bennani, M.

AU - Benoit, D. M.

AU - Berbee, E.

AU - Bertin, V.

AU - Biagi, S.

AU - Boettcher, M.

AU - Bonanno, D.

AU - Bouasla, A. B.

AU - Boumaaza, J.

AU - Bouta, M.

AU - Bouwhuis, M.

AU - Bozza, C.

AU - Bozza, R. M.

AU - Brânzaş, H.

AU - Bretaudeau, F.

AU - Breuhaus, M.

AU - Bruijn, R.

AU - Brunner, J.

AU - Bruno, R.

AU - Buis, E.

AU - Buompane, R.

AU - Busto, J.

AU - Caiffi, B.

AU - Calvo, D.

AU - Capone, A.

AU - Carenini, F.

AU - Carretero, V.

AU - Razzaque, S.

PY - 2024/10

Y1 - 2024/10

N2 - KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on an initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photo-sensors. A high-purity neutrino sample was extracted, corresponding to an exposure of 433 kton-years. The sample of 5828 neutrino candidates is analysed following a binned log-likelihood method in the reconstructed energy and cosine of the zenith angle. The atmospheric oscillation parameters are measured to be sin2θ23=0.51−0.05+0.04, and Δm312=2.18−0.35+0.25×10−3eV2∪−2.25−1.76×10−3 eV2 at 68% CL. The inverted neutrino mass ordering hypothesis is disfavoured with a p-value of 0.25.

AB - KM3NeT/ORCA is a water Cherenkov neutrino detector under construction and anchored at the bottom of the Mediterranean Sea. The detector is designed to study oscillations of atmospheric neutrinos and determine the neutrino mass ordering. This paper focuses on an initial configuration of ORCA, referred to as ORCA6, which comprises six out of the foreseen 115 detection units of photo-sensors. A high-purity neutrino sample was extracted, corresponding to an exposure of 433 kton-years. The sample of 5828 neutrino candidates is analysed following a binned log-likelihood method in the reconstructed energy and cosine of the zenith angle. The atmospheric oscillation parameters are measured to be sin2θ23=0.51−0.05+0.04, and Δm312=2.18−0.35+0.25×10−3eV2∪−2.25−1.76×10−3 eV2 at 68% CL. The inverted neutrino mass ordering hypothesis is disfavoured with a p-value of 0.25.

KW - Neutrino Detectors and Telescopes (experiments)

KW - Oscillation

UR - https://www.scopus.com/pages/publications/85208733708

U2 - 10.1007/JHEP10(2024)206

DO - 10.1007/JHEP10(2024)206

M3 - Article

AN - SCOPUS:85208733708

SN - 1126-6708

VL - 2024

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 10

M1 - 206

ER -

Measurement of neutrino oscillation parameters with the first six detection units of KM3NeT/ORCA

Abstract

Keywords

ASJC Scopus subject areas

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