Search for neutral-current induced single photon production at the ND280 near detector in T2K
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Neutrino neutral-current (NC) induced single photon production is a sub-leading 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 fine-grained 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 $5.738\times {10}^{20}$ 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 $0.114\times {10}^{-38}$ cm2 (90% C.L.) per nucleon, using the J-PARC off-axis neutrino beam with an average energy of $\left\langle {E}_{\nu }\right\rangle \sim 0.6$ 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.
Date Issued
2019-06-20
Date Acceptance
2019-05-17
Citation
Journal of Physics G: Nuclear and Particle Physics, 2019, 46 (8)
ISSN
0954-3899
Publisher
IOP Publishing
Journal / Book Title
Journal of Physics G: Nuclear and Particle Physics
Volume
46
Issue
8
Copyright Statement
© 2019 IOP Publishing. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Sponsor
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Grant Number
PP/E000509/1
ST/H000992/1
ST/H000992/2
ST/K001604/1
ST/N000242/1
Subjects
hep-ex
hep-ex
Nuclear & Particles Physics
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
Publication Status
Published
Date Publish Online
2019-06-20