First events from the CNGS neutrino beam detected in the OPERA experiment

N. Chon-Sen,A. Chukanov,R. Ciesielski,L. Consiglio,M. Cozzi,F. Dal Corso,N. D'Ambrosio,J. Damet,G. De Lellis,Y. Declais,T. Descombes,M. De Serio,F. Dal Corso,D. Di Ferdinando,A. Di Giovanni,N. Di Marco,C. Di Troia,S. Dmitrievski,M. Dracos,D. Duchesneau,B. Dulach,S. Dusini,J. Ebert,R. Enikeev,A. Ereditato,L. S. Esposito,C. Fanin,J. Favier,G. Felici,T. Ferber,L. Fournier,A. Franceschi, D. Frekers, T. Fukuda,C. Fukushima,V. I. Galkin,V. A. Galkin,R. Gallet,A. Garfagnini,G. Gaudiot, G. Giacomelli,O. Giarmana,M. Giorgini, L. Girard, C. Girerd,C. Goellnitz,J. Goldberg, Y. Gornoushkin,G. Grella,F. Grianti,C. Guerin,M. Guler,C. Gustavino,C. Hagner, T. Hamane,T. Hara, M. Hauger,M. Hess,K. Hoshino,M. Ieva, M. Incurvati,K. Jakovcic,C. Jollet,F. Juget,M. Kazuyama,S. H. Kim,M. Kimura,J. Knuesel,K. Kodama,D. Kolev, O Giarmana,M Giorgini, L Girard,C Girerd,C Goellnitz,J Goldberg, Y Gornoushkin,G Grella,F Grianti,C Guerin,M Guler,C Gustavino,C Hagner,T Hamane,T Hara,M Hauger,M Hess,K Hoshino,M Ieva,M Incurvati,K Jakovcic,J Janicsko Csathy,B Janutta, C Jollet,F Juget, M Kazuyama,S H Kim,M Kimura,J Knuesel,K Kodama,D Kolev,M Komatsu,U Kose,A Krasnoperov,I Kreslo,Z Krumstein,I Laktineh,C de La Taille,T Le Flour,S Lieunard,A Ljubicic,A Longhin,A Malgin,K Manai,G Mandrioli, U Mantello,A Marotta,J Marteau,G Martin-Chassard,V Matveev,M Messina, L Meyer,S Micanovic,P Migliozzi,S Miyamoto,P Monacelli,I Monteiro,K Morishima,U Moser,M T Muciaccia,P Mugnier,N Naganawa,M Nakamura,T Nakano,T Napolitano,M Natsume,K Niwa,Y Nonoyama,A Nozdrin,S Ogawa,A Olchevski,D Orlandi,D Ossetski,A Paoloni,B D Park,I G Park,A Pastore,L Patrizii,L Pellegrino,H Pessard,V Pilipenko,C Pistillo,N Polukhina,M Pozzato, K Pretzl,P Publichenko,L Raux,J P Repellin,T Roganova,G Romano,G Rosa, A Rubbia,V Ryasny,O Ryazhskaya,D Ryzhikov,A Sadovski,C Sanelli,O Sato,Y Sato,V Saveliev,N Savvinov,G Sazhina,A Schembri,W Schmidt Parzefall,H Schroeder,H U Schütz,L Scotto Lavina,J Sewing,H Shibuya,S Simone,M Sioli,C Sirignano,G Sirri,J S Song, R Spaeti,M Spinetti,L Stanco,N Starkov,M Stipcevic,P Strolin,V Sugonyaev,S Takahashi,V Tereschenko,F Terranova,I Tezuka,V Tioukov,I Tikhomirov,P Tolun,T Toshito,V Tsarev,R Tsenov,U Ugolino,N Ushida,G Van Beek,V Verguilov,P Vilain,L Votano,J L Vuilleumier,T Waelchli,R Waldi,M Weber,G Wilquet,B Wonsak, R Wurth,J Wurtz,V Yakushev,C S Yoon,Y Zaitsev,I Zamboni,R Zimmermann

NEW JOURNAL OF PHYSICS（2006）

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摘要

The OPERA neutrino detector at the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in appearance mode, through the study of nu(mu) --> nu(tau) oscillations. The apparatus consists of a lead/emulsion-film target complemented by electronic detectors. It is placed in the high-energy, long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. In August 2006, a first run with CNGS neutrinos was successfully conducted. A first sample of neutrino events was collected, statistically consistent with the integrated beam intensity. After a brief description of the beam and of the various sub-detectors, we report on the achievement of this milestone, presenting the first data and some analysis results.

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cngs neutrino beam,opera experiment,first events

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