Multijet cross sections in charged current e±p scattering at HERA

S. Chekanov,M. Derrick,S. Magill,B. Musgrave,D. Nicholass,J. Repond,R. Yoshida,M. C. K. Mattingly,M. Jechow,N. Pavel,P. Antonioli,G. Bari,L. Bellagamba, D. Boscherini,A. Bruni,G. Bruni,F. Cindolo,M. Corradi,G. Iacobucci, A. Margotti,R. Nania,A. Polini,S. Antonelli,M. Basile, M. Bindi, L. Cifarelli, A. Contin,S. De Pasquale,G. Sartorelli, A. Zichichi,D. Bartsch, I. Brock,H. Hartmann,E. Hilger,H.-P. Jakob,M. Jungst,A. E. Nuncio-Quiroz,E. Paul,R. Renner,U. Samson,V. Schonberg,M. Wlasenko,N. H. Brook,G. P. Heath,J. D. Morris,M. Capua, S. Fazio,A. Mastroberardino,M. Schioppa,G. Susinno,E. Tassi,J. Kim,Z. 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, U. Behrens,C. Blohm,A. Bonato, K. Borras,R. Ciesielski,N. Coppola,V. Drugakov,S. Fang,J. Fourletova, A. Geiser,P. Göttlicher,J. Grebenyuk,I. Gregor,T. Haas,W. Hain,A. Hüttmann,F. Januschek,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,A. Parenti,L. Rinaldi,P. Roloff,I. Rubinsky,R. Santamarta,U. Schneekloth, A. Spiridonov,D. Szuba,J. Szuba,T. Theedt,G. Wolf,K. Wrona,A. Yagües Molina,C. Youngman,W. Zeuner,V. Drugakov, W. Lohmann,S. Schlenstedt, G. Barbagli, E. Gallo,P. Pelfer,A. Bamberger, D. Dobur,F. Karstens,N. Vlasov, P. Bussey,A. Doyle,W. Dunne,M. Forrest,M. Rosin,D. Saxon,I. Skillicorn,I. Gialas,K. Papageorgiu,U. Holm, R. Klanner,E. Lohrmann, P. Schleper,T. Schörner-Sadenius,J. Sztuk, H. Stadie,M. Turcato, C. Foudas,C. Fry,K. Long,A. Tapper,T. Matsumoto,K. Nagano, K. Tokushuku, S. Yamada, Y. Yamazaki,A. Barakbaev, E. Boos,N. Pokrovskiy,B. Zhautykov,V. Aushev,M. Borodin,A. Kozulia,M. Lisovyi,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,J. Schwartz,R. Walsh,C. Zhou,T. Tsurugai,A. Antonov,B. Dolgoshein,D. Gladkov,V. Sosnovtsev,A. Stifutkin,S. Suchkov,R. Dementiev,P. Ermolov,L. Gladilin,Yu. Golubkov,L. Khein,I. Korzhavina,V. Kuzmin,B. Levchenko,O. Lukina,A. Proskuryakov,L. Shcheglova,D. Zotkin,I. Abt,C. Büttner,A. Caldwell,D. Kollar,B. Reisert,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,R. Devenish,J. Ferrando,B. Foster,K. Korcsak-Gorzo,K. Oliver,S. Patel,V. Roberfroid,A. Robertson,P. Straub,C. Uribe-Estrada,R. Walczak,A. Bertolin,F. Dal Corso, S. Dusini,A. Longhin,L. Stanco, P. Bellan,R. Brugnera,R. Carlin,A. Garfagnini,S. Limentani,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,O. Smith,A. Stern, 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. Costa,M. Ferrero, V. Monaco, R. Sacchi, A. Solano, M. Arneodo, M. Ruspa,S. Fourletov,J. Martin,T. Stewart,S. Boutle,J. Butterworth, C. Gwenlan,T. Jones,J. Loizides,M. Wing,B. Brzozowska,J. Ciborowski,G. Grzelak,P. Kulinski,P. Łużniak,J. Malka,R. Nowak,J. Pawlak,T. Tymieniecka,A. Ukleja,A. Żarnecki,M. Adamus,P. Plucinski,Y. Eisenberg,D. Hochman,U. Karshon, 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（2008）

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摘要

Jet cross sections were measured in charged-current deep inelastic e(+/-)p scattering at high boson virtualities Q(2) with the ZEUS detector at HERA II using an integrated luminosity of 0.36 fb(-1). Differential cross sections are presented for inclusive-jet production as functions of Q(2), Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e(+/-)p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The measured inclusive-jet cross sections are well described in shape and normalization by the NLO predictions. The data have the potential to constrain the u and d valence-quark distributions in the proton if included as input to global fits.

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关键词

cross section,quantum chromodynamics,elementary particles,deep inelastic scattering

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