TY  - JOUR
AU  - T2K Collaboration (Abe, K. et al
AU  - Antonova, M.
AU  - Cervera-Villanueva, A.
AU  - Fernandez, P.
AU  - Izmaylov, A.
AU  - Novella, P.
PY  - 2019
DA  - 2019//
TI  - Search for neutral-current induced single photon production at the ND280 near detector in T2K
T2  - J. Phys. G
JO  - Journal of Physics G
SP  - 08LT01
EP  - 16pp
VL  - 46
IS  - 8
PB  - Iop Publishing Ltd
KW  - T2K
KW  - neutrino
KW  - neutrino oscillation
KW  - neutrino interaction
KW  - Mini-BooNE
KW  - CP violation
AB  - 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 x 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 x 10(-38) cm(2) (90% C.L.) per nucleon, using the J-PARC off-axis neutrino beam with an average energy of < E-v > similar to 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.
SN  - 0954-3899
UR  - https://arxiv.org/abs/1902.03848
UR  - https://doi.org/10.1088/1361-6471/ab227d
DO  - 10.1088/1361-6471/ab227d
LA  - English
N1  - WOS:000518888100001
ID  - T2KCollaborationAbe_etal2019
ER  -