%0 Journal Article
%T Search for neutral-current induced single photon production at the ND280 near detector in T2K
%A T2K Collaboration (Abe, K. et al
%A Antonova, M.
%A Cervera-Villanueva, A.
%A Fernandez, P.
%A Izmaylov, A.
%A Novella, P.
%J Journal of Physics G
%D 2019
%V 46
%N 8
%I Iop Publishing Ltd
%@ 0954-3899
%G English
%F T2KCollaborationAbe_etal2019
%O WOS:000518888100001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4318), last updated on Tue, 24 Mar 2020 09:29:33 +0000
%X 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.
%K T2K
%K neutrino
%K neutrino oscillation
%K neutrino interaction
%K Mini-BooNE
%K CP violation
%R 10.1088/1361-6471/ab227d
%U https://arxiv.org/abs/1902.03848
%U https://doi.org/10.1088/1361-6471/ab227d
%P 08LT01-16pp