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Development of T2K 280m Near Detector Software for Muon and Photon Reconstruction

A Monte Carlo investigation into the efficiencies of the electromagnetic calorimeters in T2K’s off-axis near detector was undertaken. T2K is a long baseline neutrino oscillation experiment in Japan, running 295 km from the J-PARC facility in Tokai to the Super-Kamiokande detector in the Kamioka mine. The near detector will be installed on the J-PARC site during 2009, and has been designed to measure the neutrino flux, through charged current neutrino interactions, as well as the neutral current π 0 cross-section. To make these measurements, the calorimeters must reconstruct muons and photons with high efficiency, and it has been shown that 90% efficiency can be achieved for muons above 100 MeV and 80% for photons over 150 MeV. These are the two particles most important for the planned measurements; electrons are also very important and are expected to have efficiencies similar to photons. The efficiency deteriorates for particles with less energy, but this is clearly shown to be caused by the minimal signal created in the detector. To validate the Monte Carlo characterisation of the calorimeter, the same reconstruction methods were applied to data from the SciBooNE experiment. With the aim of measuring neutrino interaction cross-sections, the SciBooNE experiment was based at FermiLab in Illinois and used the Booster Neutrino Beam. One of SciBooNE’s detectors was the SciBar, a scintillating plastic detector similar in design to T2K’s calorimeter. The reconstruction showed 100% efficiency for locating charged muon tracks, with excellent position and direction reconstruction, and simultaneously confirmed the reconstruction of photon showers.
Number: 1

Name: Ian Taylor

Title: Development of T2K 280m Near Detector Software for Muon and Photon Reconstruction

Folder Created: 2009-07-11

Creators: Ian Taylor

Categories: ND280

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          This is the final version, as printed and submitted to the University of London.

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