First neutrino oscillation measurement in KM3NeT/ORCA

Lodewijk Nauta; Valentin Pestel; Jerzy Mańczak; Dimitris Stavropoulos; Victor Carretero; Nhan Chau; Zineb Aly; Paul de Jong; KM3NeT collaboration; M. D. Filipović; null et al.

doi:10.22323/1.395.1123

First neutrino oscillation measurement in KM3NeT/ORCA

Lodewijk Nauta, Valentin Pestel, Jerzy Mańczak, Dimitris Stavropoulos, Victor Carretero, Nhan Chau, Zineb Aly, Paul de Jong, KM3NeT collaboration, M. D. Filipović, et al.

School of Science

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3 Citations (Scopus)

Abstract

The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has been steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over “no oscillations”. Likelihood scans of the Δm₃₁² and sin² θ₂₃ parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin² θ₂₃, Δm₃₁²) is presented, showing results that are approaching to being being competitive with other experiments.

Original language	English
Article number	1123
Number of pages	11
Journal	Proceedings of Science
Volume	395
DOIs	https://doi.org/10.22323/1.395.1123
Publication status	Published - 18 Mar 2022
Event	International Cosmic Ray Conference - Virtual, Berlin, Germany Duration: 12 Jul 2021 → 23 Jul 2021 Conference number: 37th

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title = "First neutrino oscillation measurement in KM3NeT/ORCA",

abstract = "The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has been steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over “no oscillations”. Likelihood scans of the Δm312 and sin2 θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2 θ23, Δm312) is presented, showing results that are approaching to being being competitive with other experiments.",

author = "Lodewijk Nauta and Valentin Pestel and Jerzy Ma{\'n}czak and Dimitris Stavropoulos and Victor Carretero and Nhan Chau and Zineb Aly and {de Jong}, Paul and {KM3NeT collaboration} and Filipovi{\'c}, {M. D.} and {et al.}",

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AU - Nauta, Lodewijk

AU - Pestel, Valentin

AU - Mańczak, Jerzy

AU - Stavropoulos, Dimitris

AU - Carretero, Victor

AU - Chau, Nhan

AU - Aly, Zineb

AU - de Jong, Paul

AU - KM3NeT collaboration,

AU - Filipović, M. D.

AU - et al., null

N1 - Conference code: 37th

PY - 2022/3/18

Y1 - 2022/3/18

N2 - The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has been steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over “no oscillations”. Likelihood scans of the Δm312 and sin2 θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2 θ23, Δm312) is presented, showing results that are approaching to being being competitive with other experiments.

AB - The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has been steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over “no oscillations”. Likelihood scans of the Δm312 and sin2 θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2 θ23, Δm312) is presented, showing results that are approaching to being being competitive with other experiments.

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VL - 395

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 1123

T2 - International Cosmic Ray Conference

Y2 - 12 July 2021 through 23 July 2021

ER -

First neutrino oscillation measurement in KM3NeT/ORCA

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