Search for the exotic Θ resonance in the NOMAD experiment

O Samoylov; D Naumov; V Cavasinni; P Astier; D Autiero; 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; A Cervera-Villanueva; R Challis; A Chukanov; G Collazuol; G Conforto; C Conta; M Contalbrigo; R Cousins; D Daniels; H Degaudenzi; T Del Prete; A De Santo; T Dignan; 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; S Gninenko; A Godley; JJ Gomez-Cadenas; J Gosset; C Gößling; M Gouanère; A Grant; G Graziani; A Guglielmi; C Hagner; J Hernando; D Hubbard; P Hurst; N Hyett; E Iacopini; C Joseph; F Juget; N Kent; M Kirsanov; O Klimov; J Kokkonen; A Kovzelev; A Krasnoperov; S Lacaprara; C Lachaud; B Lakić; A Lanza; L La Rotonda; M Laveder; A Letessier-Selvon; JM Levy; L Linssen; A Ljubičić; J Long; A Lupi; V Lyubushkin; A Marchionni; F Martelli; X Méchain; JP Mendiburu; JP Meyer; M Mezzetto; SR Mishra; GF Moorhead; P Nédélec; Y Nefedov; C Nguyen-Mau; D Orestano; F Pastore; LS Peak; E Pennacchio; H Pessard

Journal article

Search for the exotic Θ resonance in the NOMAD experiment

O Samoylov, D Naumov, V Cavasinni, P Astier, D Autiero, 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 Show all

European Physical Journal C | SPRINGER | Published : 2007

DOI: 10.1140/epjc/s10052-006-0080-y

Abstract

A search for exotic Θ+ baryon via Θ +→p+K0 S decay mode in the NOMAD νμN data is reported. The special background generation procedure was developed. The proton identification criteria are tuned to maximize the sensitivity to the Θ+ signal as a function of xF which allows to study the Θ+ production mechanism. We do not observe any evidence for the Θ+ state in the NOMAD data. We provide an upper limit on Θ+ production rate at 90% CL as 2.13×10-3 per neutrino interaction. © Springer-Verlag Berlin Heidelberg 2007.