First neutrino event detection with nuclear emulsion at J-PARC neutrino beamline

Abstract

Precise neutrino--nucleus interaction measurements in the sub-multi GeV region are important to reduce the systematic uncertainty in future neutrino oscillation experiments. Furthermore, the excess of ${\nu }_e$ interactions, as a possible interpretation of the existence of a sterile neutrino has been observed in such an energy region. The nuclear emulsion technique can measure all the final state particles with low energy threshold for a variety of targets (Fe, C, H${}_2$O, and so on). Its sub-$\mu$m position resolution allows measurements of the ${\nu }_e$ cross-section with good electron/gamma separation capability. We started a new experiment at J-PARC to study sub-multi GeV neutrino interactions by introducing the nuclear emulsion technique. The J-PARC T60 experiment has been implemented as a first step of such a project. Systematic neutrino event analysis with full scanning data in the nuclear emulsion detector was performed for the first time. The first neutrino event detection and its analysis is described in this paper.

arXiv comment26 pages, 29 figures, 4 table, prepared for submission to PTEP

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Cited by in corpus (8)

• The European Spallation Source neutrino Super Beam Conceptual Design Report
• Particle Physics at the European Spallation Source
• First measurement of ${\bar{\nu }}_{\mu }$ and ${\nu }_{\mu }$ charged-current inclusive interactions on water using a nuclear emulsion detector
• Measuring Oscillations with A Million Atmospheric Neutrinos
• Design and performance of a scintillation tracker for track matching in nuclear-emulsion-based neutrino interaction measurement
• Measurements of protons and charged pions emitted from ${\nu }_{\mu }$ charged-current interactions on iron at a mean neutrino energy of 1.49GeV using a nuclear emulsion detector
• Momentum reconstruction of charged particles using multiple Coulomb scatterings in a nuclear emulsion detector
• SPIROS: Streamlined, Precise, Intuitive, and Rapid Optical Simulator for particle physics detectors