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 Δm231 and sin2θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2θ23,Δm231) is presented, showing results that are approaching to being being competitive with other experiments.
First neutrino oscillation measurement in KM3NeT/ORCA
Bozza, CristianoMembro del Collaboration Group
;Fusco, Luigi AntonioMembro del Collaboration Group
;Grella, GiuseppeMembro del Collaboration Group
;Poire', ChiaraMembro del Collaboration Group
;Stellacci, Simona MariaMembro del Collaboration Group
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2022-01-01
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 Δm231 and sin2θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2θ23,Δm231) is presented, showing results that are approaching to being being competitive with other experiments.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
