Rejecting cosmic background for exclusive charged current quasi elastic neutrino interaction studies with Liquid Argon TPCs; a case study with the MicroBooNE detector
European Physical Journal C Springer Nature 79:8 (2019) 673
Search for neutral-current induced single photon production at the ND280 near detector in T2K
Journal of Physics G: Nuclear and Particle Physics IOP Publishing 46:8 (2019) 08LT01
Abstract:
All rights reserved. Neutrino neutral-current (NC) induced single photon production is a subleading order process for accelerator-based neutrino beam experiments including T2K. It is, however, an important process to understand because it is a background for electron (anti)neutrino appearance oscillation experiments. Here, we performed the first search of this process below 1 GeV using the finegrained detector at the T2K ND280 off-axis near detector. By reconstructing single photon kinematics from electron positron pairs, we achieved 95% pure gamma ray sample from 5.738 1020 protons-on-targets neutrino mode data. We do not find positive evidence of NC induced single photon production in this sample. We set the model-dependent upper limit on the cross-section for this process, at 0.114 10-38 cm2 (90% C.L.) per nucleon, using the J-PARC off-axis neutrino beam with an average energy of .En. ~ 0.6 GeV. This is the first limit on this process below 1.GeV which is important for current and future oscillation experiments looking for electron neutrino appearance oscillation signals.Deep neural network for pixel-level electromagnetic particle identification in the MicroBooNE liquid argon time projection chamber
Physical Review D American Physical Society 99:9 (2019) 092001
Abstract:
We have developed a convolutional neural network that can make a pixel-level prediction of objects in image data recorded by a liquid argon time projection chamber (LArTPC) for the first time. We describe the network design, training techniques, and software tools developed to train this network. The goal of this work is to develop a complete deep neural network based data reconstruction chain for the MicroBooNE detector. We show the first demonstration of a network's validity on real LArTPC data using MicroBooNE collection plane images. The demonstration is performed for stopping muon and a νμ charged-current neutral pion data samples.First measurement of νμ charged-current π0 production on argon with the MicroBooNE detector
Physical Review D American Physical Society (APS) 99:9 (2019) 091102
Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295km
Physical Review D American Physical Society 99:7 (2019) 071103