Measurement of dijet cross sections for events with a leading neutron in photoproduction at HERA

J. Breitweg,S. Chekanov,M. Derrick,D. Krakauer,S. Magill,B. Musgrave,A. Pellegrino,J. Repond,R. Stanek,R. Yoshida,M.C.K. Mattingly,P. Antonioli,G. Bari,M. Basile,L. Bellagamba,D. Boscherini,A. Bruni,G. Bruni,G. Cara Romeo,L. Cifarelli,F. Cindolo,A. Contin,M. Corradi,S. De Pasquale,P. Giusti,G. Iacobucci,G. Levi,A. Margotti,T. Massam,R. Nania,F. Palmonari,A. Pesci,G. Sartorelli,A. Zichichi,C. Amelung,A. Bornheim,I. Brock,K. Coböken,J. Crittenden,R. Deffner,H. Hartmann,K. Heinloth,E. Hilger,P. Irrgang,H.-P. Jakob,A. Kappes,U.F. Katz,R. Kerger,E. Paul,J. Rautenberg,H. Schnurbusch,A. Stifutkin,J. Tandler,K.C. Voss,A. Weber,H. Wieber,D.S. Bailey,O. Barret,N.H. Brook,B. Foster,G.P. Heath,H.F. Heath,E. Rodrigues,J. Scott,R.J. Tapper,M. Capua,M. Schioppa,G. Susinno,H.Y. Jeoung,J.Y. Kim,J.H. Lee,I.T. Lim,K.J. Ma,M.Y. Pac,A. Caldwell,W. Liu,X. Liu,B. Mellado,S. Paganis,S. Sampson,W.B. Schmidke,F. Sciulli,J. Chwastowski,A. Eskreys,J. Figiel,K. Klimek,K. Olkiewicz,K. Piotrzkowski,M.B. Przybycień,P. Stopa,L. Zawiejski,B. Bednarek,K. Jeleń,D. Kisielewska,A.M. Kowal,T. Kowalski,M. Przybycień,E. Rulikowska-Zarȩbska,L. Suszycki,D. Szuba,A. Kotański,L.A.T. Bauerdick,U. Behrens,J.K. Bienlein,K. Borras,V. Chiochia,D. Dannheim,K. Desler,G. Drews,A. Fox-Murphy,U. Fricke,F. Goebel,S. Goers,P. Göttlicher,R. Graciani,T. Haas,W. Hain,G.F. Hartner,K. Hebbel,S. Hillert,W. Koch,U. Kötz,H. Kowalski,H. Labes,B. Löhr,R. Mankel,J. Martens,M. Martı́nez,M. Milite,M. Moritz,D. Notz,M.C. Petrucci,A. Polini,M. Rohde,A.A. Savin,U. Schneekloth,F. Selonke,M. Sievers,S. Stonjek,G. Wolf,U. Wollmer,C. Youngman,W. Zeuner,C. Coldewey,A. Lopez-Duran Viani,A. Meyer,S. Schlenstedt,P.B. Straub,G. Barbagli,E. Gallo,A. Parenti,P.G. Pelfer,A. Bamberger,A. Benen,N. Coppola,S. Eisenhardt,P. Markun,H. Raach,S. Wölfle,P.J. Bussey,M. Bell,A.T. Doyle,C. Glasman,S.W. Lee,A. Lupi,N. Macdonald,G.J. McCance,D.H. Saxon,L.E. Sinclair,I.O. Skillicorn,R. Waugh,I. Bohnet,N. Gendner,U. Holm,A. Meyer-Larsen,H. Salehi,K. Wick,T. Carli,A. Garfagnini,I. Gialas,L.K. Gladilin,D. Kçira,R. Klanner,E. Lohrmann,R. Gonçalo,K.R. Long,D.B. Miller,A.D. Tapper,R. Walker,P. Cloth,D. Filges,T. Ishii,M. Kuze,K. Nagano,K. Tokushuku,S. Yamada,Y. Yamazaki,S.H. Ahn,S.B. Lee,S.K. Park,H. Lim,D. Son,F. Barreiro,G. Garcı́a,O. González,L. Labarga,J. del Peso,I. Redondo,J. Terrón,M. Vázquez,M. Barbi,F. Corriveau,D.S. Hanna,A. Ochs,S. Padhi,D.G. Stairs,M. Wing,T. Tsurugai,A. Antonov,V. Bashkirov,M. Danilov,B.A. Dolgoshein,D. Gladkov,V. Sosnovtsev,S. Suchkov,R.K. Dementiev,P.F. Ermolov,Yu.A. Golubkov,I.I. Katkov,L.A. Khein,N.A. Korotkova,I.A. Korzhavina,V.A. Kuzmin,O.Yu. Lukina,A.S. Proskuryakov,L.M. Shcheglova,A.N. Solomin,N.N. Vlasov,S.A. Zotkin,C. Bokel,M. Botje,N. Brümmer,J. Engelen,S. Grijpink,E. Koffeman,P. Kooijman,S. Schagen,A. van Sighem,E. Tassi,H. Tiecke,N. Tuning,J.J. Velthuis,J. Vossebeld,L. Wiggers,E. de Wolf,B. Bylsma,L.S. Durkin,J. Gilmore,C.M. Ginsburg,C.L. Kim,T.Y. Ling,S. Boogert,A.M. Cooper-Sarkar,R.C.E. Devenish,J. Große-Knetter,T. Matsushita,O. Ruske,M.R. Sutton,R. Walczak,A. Bertolin,R. Brugnera,R. Carlin,F. Dal Corso,S. Dusini,S. Limentani,A. Longhin,M. Posocco,L. Stanco,M. Turcato,L. Adamczyk,L. Iannotti,B.Y. Oh,J.R. Okrasiński,P.R.B. Saull,W.S. Toothacker,J.J. Whitmore,Y. Iga,G. D'Agostini,G. Marini,A. Nigro,C. Cormack,J.C. Hart,N.A. McCubbin,T.P. Shah,D. Epperson,C. Heusch,H.F.-W. Sadrozinski,A. Seiden,R. Wichmann,D.C. Williams,I.H. Park,N. Pavel,H. Abramowicz,S. Dagan,S. Kananov,A. Kreisel,A. Levy,T. Abe,T. Fusayasu,T. Kohno,K. Umemori,T. Yamashita,R. Hamatsu,T. Hirose,M. Inuzuka,S. Kitamura,K. Matsuzawa,T. Nishimura,M. Arneodo,N. Cartiglia,R. Cirio,M. Costa,M.I. Ferrero,S. Maselli,V. Monaco,C. Peroni,M. Ruspa,R. Sacchi,A. Solano,A. Staiano,D.C. Bailey,C.-P. Fagerstroem,R. Galea,T. Koop,G.M. Levman,J.F. Martin,A. Mirea,A. Sabetfakhri,J.M. Butterworth,M.E. Hayes,E.A. Heaphy,T.W. Jones,J.B. Lane,B.J. West,J. Ciborowski,R. Ciesielski,G. Grzelak,R.J. Nowak,J.M. Pawlak,R. Pawlak,B. Smalska,T. Tymieniecka,A.K. Wróblewski,J.A. Zakrzewski,A.F. Żarnecki,M. Adamus,T. Gadaj,O. Deppe,Y. Eisenberg,D. Hochman,U. Karshon,W.F. Badgett,D. Chapin,R. Cross,C. Foudas,S. Mattingly,D.D. Reeder,W.H. Smith,A. Vaiciulis,T. Wildschek,M. Wodarczyk,A. Deshpande,S. Dhawan,V.W. Hughes,S. Bhadra,C. Catterall,J.E. Cole,W.R. Frisken,R. Hall-Wilton,M. Khakzad,S. Menary

Nuclear Physics B（2001）

Cited 33|Views150

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Abstract

Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e++p→e++n+jet+jet+Xr have been measured with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb−1. The fraction of dijet events with a leading neutron in the final state was studied as a function of the jet kinematic variables. The cross sections were measured for jet transverse energies ETjet>6 GeV, neutron energy En>400 GeV, and neutron production angle θn<0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model.

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Key words

deep inelastic scattering,monte carlo

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