7 research outputs found
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A new method for detection of distant supernova neutrino bursts
We suggest a new method for detection of neutrino bursts generated by distant supernovas in our galaxy and in the local group of galaxies. This new method is based on the detection of neutrons produced in the inelastic scattering of νμ and ντ neutrinos with nuclei via the neutral current channel. The advantages of such a detector are (1) the enhancement of neutrino scattering cross sections due to nuclear collective effects, (2) the selective detection of νμ and ντ supernova neutrinos, and (3) the existence of large geological deposits of suitable neutrino detector materials in nature. © 1990
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A new method for detection of distant supernova neutrino bursts
We suggest a new method for detection of neutrino bursts generated by distant supernovas in our galaxy and in the local group of galaxies. This new method is based on the detection of neutrons produced in the inelastic scattering of ν and ν neutrinos with nuclei via the neutral current channel. The advantages of such a detector are (1) the enhancement of neutrino scattering cross sections due to nuclear collective effects, (2) the selective detection of ν and ν supernova neutrinos, and (3) the existence of large geological deposits of suitable neutrino detector materials in nature. © 1990. μ τ μ
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First Measurement of Electron Neutrino Appearance in NOvA.
We report results from the first search for ν_{μ}→ν_{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{20} protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π<δ_{CP}<0.5π in the inverted mass hierarchy at the 90% C.L
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First measurement of muon-neutrino disappearance in NOvA
This paper reports the first measurement using the NOvA detectors of νμ disappearance in a νμ beam. The analysis uses a 14 kton-equivalent exposure of 2.74×1020 protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure Δm322=(2.52-0.18+0.20)×10-3 eV2 and sin2θ23 in the range 0.38-0.65, both at the 68% confidence level, with two statistically degenerate best-fit points at sin2θ23=0.43 and 0.60. Results for the inverted mass hierarchy are also presented