Data di Pubblicazione:
1996
Abstract:
The production of phi mesons in the reaction e(+)p --> e(+)phi p (phi --> K+K-) at a median Q(2) of 10(-4) GeV2 has been studied with the ZEUS detector at HERA. The differential phi photoproduction cross section d sigma/dt has an exponential shape and has been determined in the kinematic range 0.1 < \t\ < 0.5 GeV2 and 60 < W < 80 GeV. An integrated cross section of sigma(gamma p-->phi p) = 0.96+/-0.19(-0.18)(+0.21) mu b has been obtained by extrapolating to t = 0. When compared to lower energy data, the results show a weak energy dependence of both sigma(gamma-->phi p) and the slope of the t distribution. The phi decay angular distributions are consistent with s-channel helicity conservation. From lower energies to HERA energies, the features of phi photoproduction are compatible with those of a soft diffractive process.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
ZEUS; ZEUS BARREL CALORIMETER; CONSTRUCTION; DETECTOR; PHYSICS; DESIGN
Elenco autori:
M. Derrick;D. Krakauer;S. Magill;D. Mikunas;B. Musgrave;J. R. Okrasinski;J. Repond;R. Stanek;R. L. Talaga;H. Zhang;M. C. K.;G. Bari;M. Basile;L. Bellagamba;D. Boscherini;A. Bruni;G. Bruni;P. Bruni;G. C. Romeo;G. Castellini;L. Cifarelli;F. Cindolo;A. Contin;M. Corradi;I. Gialas;P. Giusti;G. Iacobucci;G. Laurenti;G. Levi;A. Margotti;T. Massam;R. Nania;F. Palmonari;A. Polini;G. Sartorelli;Y. Z. Garcia;A. Zichichi;A. Bornheim;J. Crittenden;T. Doeker;M. Eckert;L. Feld;A. Frey;M. Geerts;M. Grothe;H. Hartmann;K. Heinloth;L. Heinz;E. Hilger;H. P. Jakob;U. F. Katz;S. Mengel;J. Mollen;E. Paul;M. Pfeiffer;C. Rembser;D. Schramm;J. Stamm;R. Wedemeyer;S. CampbellRobson;A. Cassidy;W. N. Cottingham;N. Dyce;B. Foster;S. George;M. E. Hayes;G. P. Heath;H. F. Heath;D. Piccioni;D. G. Roff;R. J. Tapper;R. Yoshida;M. Arneodo;R. Ayad;M. Capua;A. Garfagnini;L. Iannotti;M. Schioppa;G. Susinno;A. Caldwell;N. Cartiglia;Z. Jing;W. Liu;J. A. Parsons;S. Ritz;F. Sciulli;P. B. Straub;L. Wai;S. Yang;Q. Zhu;P. Borzemski;J. Chwastowski;A. Eskreys;M. Zachara;L. Zawiejski;L. Adamczyk;B. Bednarek;K. Jelen;D. Kisielewska;T. Kowalski;M. Przybycien;E. RulikowskaZarebska;L. Suszycki;J. Zajac;A. Kotanski;L. A. T.;U. Behrens;H. Beier;J. K. Bienlein;O. Deppe;K. Desler;G. Drews;M. Flasinski;D. J. Gilkinson;C. Glasman;P. Gottlicher;J. GrosseKnetter;T. Haas;W. Hain;D. Hasell;H. Hessling;Y. Iga;K. F. Johnson;P. Joos;M. Kasemann;R. Klanner;W. Koch;U. Kotz;H. Kowalski;J. Labs;A. Ladage;B. Lohr;M. Lowe;D. Luke;J. Mainusch;O. Manczak;T. Monteiro;J. S. T.;D. Notz;K. Ohrenberg;K. Piotrzkowski;M. Roco;M. Rohde;J. Roldan;U. Schneekloth;W. Schulz;F. Selonke;B. Surrow;T. Voss;D. Westphal;G. Wolf;C. Youngman;W. Zeuner;H. J. Grabosch;A. Kharchilava;S. M. Mari;A. Meyer;S. Schlenstedt;N. Wulff;G. Barbagli;E. Gallo;P. Pelfer;G. Maccarrone;S. DePasquale;L. Votano;A. Bamberger;S. Eisenhardt;T. Trefzger;S. Wolfle;J. T. Bromley;N. H. Brook;P. J. Bussey;A. T. Doyle;D. H. Saxon;L. E. Sinclair;M. L. Utley;A. S. Wilson;A. Dannemann;U. Holm;D. Horstmann;R. Sinkus;K. Wick;B. D. Burow;L. Hagge;E. Lohrmann;J. Milewski;N. Pavel;G. Poelz;W. Schott;F. Zetsche;T. C. Bacon;N. Brummer;I. Butterworth;V. L. Harris;G. Howell;B. H. Y.;L. Lamberti;K. R. Long;D. B. Miller;A. Prinias;J. K. Sedgbeer;D. Sideris;A. F. Whitfield;U. Mallik;M. Z. Wang;S. M. Wang;J. T. Wu;P. Cloth;D. Filges;S. H. An;G. H. Cho;B. J. Ko;S. B. Lee;S. W. Nam;H. S. Park;S. K. Park;S. Kartik;H. J. Kim;R. R. McNeil;W. Metcalf;V. K. Nadendla;F. Barreiro;G. Cases;J. P. Fernandez;R. Graciani;J. M. Hernandez;L. Hervas;L. Labarga;M. Martinez;J. delPeso;J. Puga;J. Terron;J. F. deTroconiz;F. Corriveau;D. S. Hanna;J. Hartmann;L. W. Hung;J. N. Lim;C. G. Matthews;P. M. Patel;M. Riveline;D. G. Stairs;M. StLaurent;R. Ullmann;G. Zacek;T. Tsurugai;V. Bashkirov;B. A. Dolgoshein;A. Stifutkin;G. L. Bashindzhagyan;P. F. Ermolov;L. K. Gladilin;Y. A. Golubkov;V. D. Kobrin;I. A. Korzhavina;V. A. Kuzmin;O. Y. Lukina;A. S. Proskuryakov;A. A. Savin;L. M. Shcheglova;A. N. Solomin;N. P. Zotov;M. Botje;F. Chlebana;J. Engelen;M. deKamps;P. Kooijman;A. Kruse;A. vanSighem;H. Tiecke;W. Verkerke;J. Vossebeld;M. Vreeswijk;L. Wiggers;E. deWolf;R. vanWoudenberg;D. Acosta;B. Bylsma;L. S. Durkin;J. Gilmore;C. Li;T. Y. Ling;P. Nylander;I. H. Park;T. A. Romanowski;D. S. Bailey;R. J. Cashmore;A. M. CooperSarkar;R. C. E.;N. Harnew;M. Lancaster;L. Lindemann;J. D. McFall;C. Nath;V. A. Noyes;A. Quadt;J. R. Tickner;H. Uijterwaal;R. Walczak;D. S. Waters;F. F. Wilson;T. Yip;G. Abbiendi;A. Bertolin;R. Brugnera;R. Carlin;F. DalCorso;M. DeGiorgi;U. Dosselli;S. Limentani;M. Morandin;M. Posocco;L. Stanco;R. Stroili;C. Voci;F. Zuin;J. Bulmahn;R. G. Feild;B. Y. Oh;J. J. Whitmore;G. D
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