Data di Pubblicazione:
2003
Abstract:
Dijet angular distributions of photoproduction events in which a D*(+/-) meson is produced in association with one of two energetic jets have been measured with the ZEUS detector at HERA, using an integrated luminosity of 120 pb(-1). Differential cross sections as a function of the angle between the charm-jet and the proton-beam direction in the dijet rest frame have been measured for samples enriched in direct or resolved photon events. The results are compared with predictions from leading order parton-shower Monte Carlo models and with next-to-leading-order QCD calculations. The angular distributions show clear evidence for the existence of charm originating from the photon. (C) 2003 Published by Elsevier B.V.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
ZEUS; HEAVY FLAVOR PRODUCTION; ENERGY HADRON-COLLISIONS; INITIAL-STATE RADIATION; CARLO GENERATOR CASCADE; QUARK PRODUCTION; CROSS-SECTIONS; SMALL-X; PARTON DISTRIBUTIONS; QCD COHERENCE; PHOTON
Elenco autori:
S. Chekanov;M. Derrick;D. Krakauer;J. H. Loizides;S. Magill;B. Musgrave;J. Repond;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;A. Margotti;R. Nania;F. Palmonari;A. Pesci;G. Sartorelli;A. Zichichi;G. Aghuzumtsyan;D. Bartsch;I. Brock;S. Goers;H. Hartmann;E. Hilger;P. Irrgang;H. P. Jakob;A. Kappes;U. F. Katz;O. Kind;U. Meyer;E. Paul;J. Rautenberg;R. Renner;A. Stifutkin;J. Tandler;K. C. Voss;M. Wang;A. Weber;D. S. Bailey;N. H. Brook;J. E. Cole;B. Foster;G. P. Heath;H. F. Heath;S. Robins;E. Rodrigues;J. Scott;R. J. Tapper;M. Wing;M. Capua;A. Mastroberardino;M. Schioppa;G. Susinno;J. Y. Kim;Y. K. Kim;J. H. Lee;I. T. Lim;M. Y. Pac;A. Caldwell;M. Helbich;X. Liu;B. Mellado;Y. Ning;S. Paganis;Z. Ren;W. Schmidke;F. Sciulli;J. Chwastowski;A. Eskreys;J. Figiel;K. Olkiewicz;P. Stopa;L. Zawiejski;L. Adamczyk;T. Bold;I. Grabowska-Bold;D. Kisielewska;A. M. Kowal;M. Kowal;T. Kowalski;M. Przybycien;L. Suszycki;D. Szuba;J. Szuba;A. Kotanski;W. Slominski;L. A. T.;U. Behrens;I. Boch;K. Borras;V. Chiochia;D. Dannheim;G. Drews;J. Fourletova;U. Fricke;A. Geiser;F. Goebel;P. Gottlicher;O. Gutsche;T. Haas;W. Hain;G. F. Hartner;S. Hillert;B. Kahle;U. Kotz;H. Kowalski;G. Kramberger;H. Labes;D. Lelas;B. Lohr;R. Mankel;I. A. Melzer-Pellmann;M. Moritz;C. N. Nguyen;D. Notz;M. C. Petrucci;A. Polini;A. Raval;U. Schneekloth;F. Selonke;H. Wessoleck;G. Wolf;C. Youngman;W. Zeuner;S. Schlenstedt;G. Barbagli;E. Gallo;C. Genta;P. G. Pelfer;A. Bamberger;A. Benen;N. Coppola;M. Bell;P. J. Bussey;A. T. Doyle;C. Glasman;J. Hamilton;S. Hanlon;S. W. Lee;A. Lupi;D. Saxon;O. I. Skillicorn;I. Gialas;B. Bodmann;T. Carli;U. Holm;K. Klimek;N. Krumnack;E. Lohrmann;M. Milite;H. Salehi;S. Stonjek;K. Wick;A. Ziegler;A. Ziegler;C. Collins-Tooth;C. Foudas;R. Goncalo;K. R. Long;A. D. Tapper;P. Cloth;D. Filges;M. Kuze;K. Nagano;K. Tokushuku;S. Yamada;Y. Yamazaki;A. Barakbaev;E. G. Boos;N. S. Pokrovskiy;B. O. Zhautykov;H. Lim;D. Son;K. Piotrzkowski;F. Barreiro;O. Gonzalez;L. Labarga;J. d. Peso;E. Tassi;J. Terron;M. Vazquez;M. Barbi;F. Corriveau;S. Gliga;J. Lainesse;S. Padhi;D. G. Stairs;T. Tsurugai;A. Antonov;P. Danilov;B. A. Dolgoshein;D. Gladkov;V. Sosnovtsev;S. Suchkov;R. K. Dementiev;R. Ermolov;Y. A. Golubkov;I. I. Katkov;L. A. Khein;I. A. Korzhavina;V. A. Kuzmin;B. B. Levchenko;O. Y. Lukina;A. S. Proskuryakov;L. M. Shcheglova;N. N. Vlasov;S. A. Zotkin;N. Coppola;S. Grijpink;E. Koffeman;K. Kooijman;E. Maddox;A. Pellegrino;S. Schagen;H. Tiecke;N. Tuning;J. J. Velthuis;L. Wiggers;E. d. Wolf;N. Brummer;B. Bylsma;L. S. Durkin;T. Y. Ling;S. Boogert;A. M. Cooper-Sarkar;R. C. E.;J. Ferrando;G. Grzelak;S. Patel;M. Rigby;M. R. Sutton;R. Walczak;A. Bertolin;R. Brugnera;R. Carlin;F. D. Corso;S. Dusini;A. Garfagnini;S. Limentani;A. Longhin;A. Parenti;P. Posocco;L. Stanco;M. Turcato;E. A. Heaphy;F. Metlica;B. Y. Oh;P. R. B.;J. J. Whitmore;Y. Iga;G. D. D'Agostini;G. Marini;A. Nigro;C. Cormack;J. C. Hart;N. A. McCubbin;C. Heusch;I. H. Park;N. Pavel;H. Abramowicz;A. Gabareen;S. Kananov;A. Kreisel;A. Levy;T. Abe;T. Fusayasu;S. Kagawa;T. Kohno;T. Tawara;T. Yamashita;R. Hamatsu;T. Hirose;M. Inuzuka;S. Kitamura;K. Matsuzawa;T. Nishimura;M. Arneodo;M. I. Ferrero;V. Monaco;M. Ruspa;R. Sacchi;A. Solano;T. Koop;G. M. Levman;J. F. Martin;A. Mirea;J. M. Butterworth;C. Gwenlan;R. Hall-Wilton;T. W. Jones;M. S. Lightwood;B. J. West;J. Ciborowski;R. Ciesielski;R. J. Nowak;J. M. Pawlak;J. Sztuk;T. Tymieniecka;A. Ukleja;J. Ukleja;A. F. Zarnecki;M. Adamus;P. Plucinski;Y. Eisenberg;L. K. Gladilin;D. Hochman;U. Karshon;D. Kcira;S. Lammers;L. Li;D. D. Reeder;A
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