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

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

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

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10.1007/JHEP10(2024)206

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@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 - http://www.scopus.com/inward/record.url?scp=85208733708&partnerID=8YFLogxK

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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