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Title: | Search for neutral-current induced single photon production at the ND280 near detector in T2K |
Authors: | T2K Collaboration; Abe, K.; Akutsu, R.; Ali, A.; Andreopoulos, C.; Anthony, L.; Antonova, M.; Aoki, S.; Ariga, A.; Ashida, Y.; Awataguchi, Y.; Azuma, Y.; Ban, S.; Barbi, M.; Barker, G.J.; Barr, G.; Barry, C.; Batkiewicz-Kwasniak, M.; Bench, F.; Berardi, V.; Berkman, S.; Berner, R.M.; Berns, L.; Bhadra, S.; Bienstock, S.; Blondel, A.; Bolognesi, S.; Bourguille, B.; Boyd, S.B.; Brailsford, D.; Bravar, A.; Bronner, C.; Avanzini, M.B.; Calcutt, J.; Campbell, T.; Cao, S.; Cartwright, S.L.; Catanesi, M.G.; Cervera Villanueva, Anselmo ![]() ![]() ![]() |
Keywords: | T2K neutrino neutrino oscillation neutrino interaction Mini-BooNE CP violation |
Issue Date: | Jun-2019 |
Citation: | Journal of Physics G: Nuclear and Particle Physics 46 (8): 08LT01 (2019) |
Abstract: | 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. |
Publisher version (URL): | http://dx.doi.org/10.1088/1361-6471/ab227d |
URI: | http://hdl.handle.net/10261/208903 |
DOI: | 10.1088/1361-6471/ab227d |
Identifiers: | doi: 10.1088/1361-6471/ab227d issn: 1361-6471 |
Appears in Collections: | (IFIC) Artículos |
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