Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e(+) + p --> e(+) + n + jet + jet + X(r) 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 E(T)(jet) > 6 GeV, neutron energy E(n) > 400 GeV, and neutron production angle theta (n) < 0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model. (C) 2001 Elsevier Science B.V. All rights reserved.

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

CIRIO, Roberto;COSTA, Marco;MONACO, Vincenzo;PERONI, Cristiana;SACCHI, Roberto;SOLANO, Ada Maria;
2001-01-01

Abstract

Differential cross sections for dijet photoproduction in association with a leading neutron using the reaction e(+) + p --> e(+) + n + jet + jet + X(r) 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 E(T)(jet) > 6 GeV, neutron energy E(n) > 400 GeV, and neutron production angle theta (n) < 0.8 mrad. The data are broadly consistent with factorization of the lepton and hadron vertices and with a simple one-pion-exchange model. (C) 2001 Elsevier Science B.V. All rights reserved.
2001
596
3
29
http://dx.doi.org/10.1016/S0550-3213(00)00612-X
ZEUS; NN FORM-FACTOR; DEEP-INELASTIC SCATTERING; CTEQ PARTON DISTRIBUTIONS; CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; TRIPLE-REGGEON MODEL; 100 GEV-C; PION EXCHANGE; INCLUSIVE REACTIONS; MONTE-CARLO
J. Breitweg;S. Chekanov;M. Derrick;D. Krakauer;S. Magill;B. Musgrave;A. Pellegrino;J. Repond;R. Stanek;R. Yoshida;M. C. K.;P. Antonioli;G. Bari;M. Basile;L. Bellagamba;D. Boscherini;A. Bruni;G. Bruni;G. C. Romeo;L. Cifarelli;F. Cindolo;A. Contin;M. Corradi;S. D. 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. Coboken;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;A. Mastroberardino;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. Przybycien;P. Stopa;L. Zawiejski;B. Bednarek;K. Jelen;D. Kisielewska;A. M. Kowal;T. Kowalski;M. Przybycien;E. Rulikowska-Zarebska;L. Suszycki;D. Szuba;A. Kotanski;L. A. T.;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. Gottlicher;R. Graciani;T. Haas;W. Hain;G. F. Hartner;K. Hebbel;S. Hillert;W. Koch;U. Kotz;H. Kowalski;H. Labes;B. Lohr;R. Mankel;J. Martens;M. Martinez;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. L. D.;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. Wolfle;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. Kcira;R. Klanner;E. Lohrmann;R. Goncalo;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. Garcia;O. Gonzalez;L. Labarga;J. d. Peso;I. Redondo;J. Terron;M. Vazquez;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;Y. A. Golubkov;I. I. Katkov;L. A. Khein;N. A. Korotkova;I. A. Korzhavina;V. A. Kuzmin;O. Y. Lukina;A. S. Proskuryakov;L. M. Shcheglova;A. N. Solomin;N. N. Vlasov;S. A. Zotkin;C. Bokel;M. Botje;N. Brummer;J. Engelen;S. Grijpink;E. Koffeman;P. Kooijman;S. Schagen;A. v. Sighem;E. Tassi;H. Tiecke;N. Tuning;J. J. Velthuis;J. Vossebeld;L. Wiggers;E. d. 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.;J. Grosse-Knetter;T. Matsushita;O. Ruske;M. R. Sutton;R. Walczak;A. Bertolin;R. Brugnera;R. Carlin;F. D. Corso;S. Dusini;S. Limentani;A. Longhin;M. Posocco;L. Stanco;M. Turcato;L. Adamczyk;L. Iannotti;B. Y. Oh;J. R. Okrasinski;P. R. B.;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.;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. Wroblewski;J. A. Zakrzewski;A. F. Zarnecki;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
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