6 research outputs found

    Results from ND280 near detector

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    Since the beginning of operation of the Tokai to Kamioka experiment (T2K) the Near Detector system (ND280) has been collecting neutrino interactions. It was able to collect large statistics of data within a few years of operation of the T2K experiment because of high beam intensity and its close location to the production point, a distance of the 280 m from the production target. This paper presents results of a measurement of charged current interactions in ND280 which are used to suppress systematic errors in the oscillation analysis. Systematic effects due to uncertainty in the beam profile and cross sections of neutrino interactions are also discussed

    Low energy radioactivity BG model in Super-Kamiokande detector from SK-IV data

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    Follow-up of GWTC-2 gravitational wave events with neutrinos from the Super-Kamiokande detector

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    Combined Pre-Supernova Alert System with Kamland and Super-Kamiokande

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    International audiencePreceding a core-collapse supernova, various processes produce an increasing amount of neutrinos of all flavors characterized by mounting energies from the interior of massive stars. Among them, the electron antineutrinos are potentially detectable by terrestrial neutrino experiments such as KamLAND and Super-Kamiokande via inverse beta decay interactions. Once these pre-supernova neutrinos are observed, an early warning of the upcoming core-collapse supernova can be provided. In light of this, KamLAND and Super-Kamiokande have been monitoring pre-supernova neutrinos since 2015 and 2021, respectively. Recently, we performed a joint study between KamLAND and Super-Kamiokande on pre-supernova neutrino detection. A pre-supernova alert system combining the KamLAND detector and the Super-Kamiokande detector is developed and put into operation, which can provide a supernova alert to the astrophysics community. Fully leveraging the complementary properties of these two detectors, the combined alert is expected to resolve a pre-supernova neutrino signal from a 15 M⊙_{\odot} star within 510 pc of the Earth, at a significance level corresponding to a false alarm rate of no more than 1 per century. For a Betelgeuse-like model with optimistic parameters, it can provide early warnings up to 12 hours in advance
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