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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Search for neutral-current induced single photon production at the ND280 near detector in T2K
AU - T2K Collaboration
AU - Abe, K.
AU - Akutsu, R.
AU - Andreopoulos, C.
AU - Antonova, M.
AU - Aoki, S.
AU - Ariga, A.
AU - Ashida, Y.
AU - Awataguchi, Y.
AU - Azuma, Y.
AU - Ban, S.
AU - Barbi, M.
AU - Barker, G. J.
AU - Barr, G.
AU - Barry, C.
AU - Batkiewicz-Kwasniak, M.
AU - Bench, F.
AU - Berardi, V.
AU - Berkman, S.
AU - Berner, R. M.
AU - Berns, L.
AU - Bhadra, S.
AU - Bienstock, S.
AU - Blondel, A.
AU - Bolognesi, S.
AU - Bourguille, B.
AU - Brailsford, D.
AU - Bravar, A.
AU - Bronner, C.
AU - Avanzini, M. Buizza
AU - Calcutt, J.
AU - Campbell, T.
AU - Cao, S.
AU - Catanesi, M. G.
AU - Cervera, A.
AU - Chappell, A.
AU - Checchia, C.
AU - Cherdack, D.
AU - Chikuma, N.
AU - Christodoulou, G.
AU - Coleman, J.
AU - Collazuol, G.
AU - Dealtry, T.
AU - Finch, A. J.
AU - Knox, A.
AU - Kormos, L. L.
AU - Lawe, M.
AU - Nowak, J.
AU - O'Keeffe, H. M.
AU - Ratoff, P. N.
AU - Shaw, D.
N1 - 5 figures, 1 table
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
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.
KW - hep-ex
U2 - 10.1088/1361-6471/ab227d
DO - 10.1088/1361-6471/ab227d
M3 - Journal article
VL - 46
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
SN - 0954-3899
IS - 8
M1 - 08LT01
ER -