High-ET dijet photoproduction at HERA

S. Chekanov,M. Derrick,S. Magill,B. Musgrave,D. Nicholass,J. Repond,R. Yoshida,M. C. K. Mattingly,M. Jechow,N. Pavel,A. G. Yagues Molina,S. Antonelli,P. Antonioli,G. Bari,M. Basile, L. Bellagamba,M. Bindi, D. Boscherini,A. Bruni,G. Bruni, L. Cifarelli,F. Cindolo,A. Contin,M. Corradi,S. De Pasquale,G. Iacobucci, A. Margotti,R. Nania, A. Polini, G. Sartorelli, A. Zichichi,D. Bartsch, I. Brock,S. Goers,H. Hartmann,E. Hilger,H.-P. Jakob,M. Jungst,O. M. Kind,A. E. Nuncio-Quiroz,E. Paul,R. Renner,U. Samson,V. Schonberg,R. Shehzadi,M. Wlasenko,N. H. Brook,G. P. Heath,J. D. Morris,M. Capua,S. Fazio,A. Mastroberardino,M. Schioppa,G. Susinno,E. Tassi,J. Y. Kim,K. J. Ma,Z. A. Ibrahim,B. Kamaluddin,W. Wan Abdullah,Y. Ning,Z. Ren,F. Sciulli,J. Chwastowski,A. Eskreys,J. Figiel,A. Galas,M. Gil,K. Olkiewicz,P. Stopa,L. Zawiejski,L. Adamczyk,T. Bołd,I. Grabowska-Bołd, D. Kisielewska,J. Łukasik,M. Przybycień,L. Suszycki,A. Kotański,W. Słomiński,V. Adler, U. Behrens,I. Bloch,C. Blohm, A. Bonato,K. Borras, R. Ciesielski,N. Coppola,A. Dossanov,V. Drugakov,J. Fourletova, A. Geiser,D. Gladkov,P. Göttlicher,J. Grebenyuk,I. Gregor,T. Haas,W. Hain,C. Horn,A. Hüttmann,B. Kahle, I. Katkov,U. Klein,U. Kötz,H. Kowalski,E. Lobodzinska,B. Löhr, R. Mankel,I.-A. Melzer-Pellmann,S. Miglioranzi,A. Montanari,T. Namsoo,D. Notz,L. Rinaldi,P. Roloff,I. Rubinsky,R. Santamarta,U. Schneekloth, A. Spiridonov, H. Stadie, D. Szuba,J. Szuba,T. Theedt,G. Wolf,K. Wrona,C. Youngman, W. Zeuner, W. Lohmann,S. Schlenstedt, G. Barbagli, E. Gallo,P. Pelfer,A. Bamberger, D. Dobur,F. Karstens,N. Vlasov, P. Bussey,A. Doyle,W. Dunne,J. Ferrando,M. Forrest,D. Saxon,I. Skillicorn,I. Gialas,K. Papageorgiu,T. Gosau,U. Holm,R. Klanner,E. Lohrmann,H. Perrey,H. Salehi, P. Schleper,T. Schörner-Sadenius,J. Sztuk,K. Wichmann,K. Wick, C. Foudas,C. Fry,K. Long,A. Tapper,M. Kataoka,T. Matsumoto,K. Nagano,K. Tokushuku, S. Yamada,Y. Yamazaki,A. Barakbaev, E. Boos,N. Pokrovskiy,B. Zhautykov,V. Aushev, D. Son,J. de Favereau,K. Piotrzkowski,F. Barreiro,C. Glasman,M. Jimenez, L. Labarga,J. del Peso,E. Ron,M. Soares, J. Terrón,M. Zambrana,F. Corriveau,C. Liu,R. Walsh,C. Zhou,T. Tsurugai,A. Antonov,B. Dolgoshein,V. Sosnovtsev,A. Stifutkin,S. Suchkov,R. Dementiev,P. Ermolov,L. Gladilin,L. Khein,I. Korzhavina,V. Kuzmin,B. Levchenko,O. Lukina,A. Proskuryakov,L. Shcheglova,D. Zotkin,S. Zotkin,I. Abt,C. Büttner,A. Caldwell,D. Kollar,W. Schmidke,J. Sutiak,G. Grigorescu,A. Keramidas, E. Koffeman,P. Kooijman,A. Pellegrino,H. Tiecke,M. Vázquez,L. Wiggers,N. Brümmer, B. Bylsma,L. Durkin,A. Lee,T. Ling,P. Allfrey,M. Bell, A. Cooper-Sarkar,A. Cottrell,R. Devenish,B. Foster,K. Korcsak-Gorzo,S. Patel,V. Roberfroid,A. Robertson,P. Straub,C. Uribe-Estrada, R. Walczak, P. Bellan,A. Bertolin,R. Brugnera,R. Carlin,F. Dal Corso,S. Dusini,A. Garfagnini,S. Limentani,A. Longhin,L. Stanco,M. Turcato,B. Oh,A. Raval,J. Ukleja, J. Whitmore,Y. Iga,G. D’Agostini,G. Marini, A. Nigro,J. Cole,J. Hart, H. Abramowicz,A. Gabareen,R. Ingbir,S. Kananov,A. Levy,M. Kuze,J. Maeda,R. Hori,S. Kagawa,N. Okazaki, S. Shimizu,T. Tawara,R. Hamatsu,H. Kaji,S. Kitamura,O. Ota,Y. Ri,M. Ferrero, V. Monaco, R. Sacchi, A. Solano,M. Arneodo, M. Ruspa,S. Fourletov,J. Martin,S. Boutle,J. Butterworth,C. Gwenlan,T. Jones,J. Loizides,M. Sutton,C. Targett-Adams, M. Wing,B. Brzozowska,J. Ciborowski,G. Grzelak,P. Kulinski,P. Łużniak,J. Malka,R. Nowak,J. Pawlak,T. Tymieniecka,J. Ukleja,A. Żarnecki,M. Adamus,P. Plucinski,Y. Eisenberg,I. Giller,D. Hochman,U. Karshon,M. Rosin, E. Brownson,T. Danielson,A. Everett,D. Kçira,D. Reeder,P. Ryan, A. Savin,W. Smith,H. Wolfe,S. Bhadra,C. Catterall,Y. Cui,G. Hartner, S. Menary,U. Noor,J. Standage,J. Whyte

PHYSICAL REVIEW D（2007）

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摘要

The cross section for high-E-T dijet production in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8 pb(-1). The events were required to have a virtuality of the incoming photon, Q(2), of less than 1 GeV2 and a photon-proton center-of-mass energy in the range 142 < W-gamma p < 293 GeV. Events were selected if at least two jets satisfied the transverse-energy requirements of E-T(jet1)> 20 GeV and E-T(jet2)> 15 GeV and pseudorapidity (with respect to the proton beam direction) requirements of -1 更多

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