A search for single photon events in neutrino interactions

CT Kullenberg; SR Mishra; D Dimmery; XC Tian; D Autiero; S Gninenko; A Rubbia; S Alekhin; P Astier; A Baldisseri; M Baldo-Ceolin; M Banner; G Bassompierre; K Benslama; N Besson; I Bird; B Blumenfeld; F Bobisut; J Bouchez; S Boyd; A Bueno; S Bunyatov; L Camilleri; A Cardini; PW Cattaneo; V Cavasinni; A Cervera-Villanueva; R Challis; A Chukanov; G Collazuol; G Conforto; C Conta; M Contalbrigo; R Cousins; H Degaudenzi; A De Santo; T Del Prete; L Di Lella; E do Couto e Silva; J Dumarchez; M Ellis; GJ Feldman; R Ferrari; D Ferrère; V Flaminio; M Fraternali; JM Gaillard; E Gangler; A Geiser; D Geppert; D Gibin; A Godley; JJ Gomez-Cadenas; J Gosset; C Gößling; M Gouanère; A Grant; G Graziani; A Guglielmi; C Hagner; J Hernando; P Hurst; N Hyett; E Iacopini; C Joseph; F Juget; N Kent; O Klimov; J Kokkonen; A Kovzelev; A Krasnoperov; JJ Kim; M Kirsanov; S Kulagin; S Lacaprara; C Lachaud; B Lakić; A Lanza; L La Rotonda; M Laveder; A Letessier-Selvon; JM Levy; J Ling; L Linssen; A Ljubičić; J Long; A Lupi; V Lyubushkin; A Marchionni; F Martelli; X Méchain; JP Mendiburu; JP Meyer; M Mezzetto; GF Moorhead; D Naumov; P Nédélec; Y Nefedov; C Nguyen-Mau; D Orestano

Journal article

A search for single photon events in neutrino interactions

CT Kullenberg, SR Mishra, D Dimmery, XC Tian, D Autiero, S Gninenko, A Rubbia, S Alekhin, P Astier, A Baldisseri, M Baldo-Ceolin, M Banner, G Bassompierre, K Benslama, N Besson, I Bird, B Blumenfeld, F Bobisut, J Bouchez, S Boyd Show all

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Published : 2012

DOI: 10.1016/j.physletb.2011.11.049

Open access

Abstract

We present a search for neutrino induced events containing a single, exclusive photon using data from the NOMAD experiment at the CERN SPS where the average energy of the neutrino flux is ≃25 GeV. The search is motivated by an excess of electron-like events in the 200-475 MeV energy region as reported by the MiniBooNE experiment. In NOMAD, photons are identified via their conversion to e+e- in an active target embedded in a magnetic field. The background to the single photon signal is dominated by the asymmetric decay of neutral pions produced either in a coherent neutrino-nucleus interaction, or in a neutrino-nucleon neutral current deep inelastic scattering, or in an interaction occurring ..

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