The cross section of charm production in gamma gamma collisions sigma(e(+)e(-) --> e(+)e(-)c (c) over bar X) is measured at LEP with the L3 detector at centre-of-mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semileptonic decays. The direct process gamma gamma --> c (c) over bar is found to be insufficient to describe the data. The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon, (C) 1999 Published by Elsevier Science B.V. All rights reserved.
Inclusive charm production in two-photon collisions at LEP / M. Acciarri;P. Achard;O. Adriani;M. Aguilar-Benitez;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;M. G. Alviggi;G. Ambrosi;H. Anderhub;V. P. Andreev;T. Angelescu;F. Anselmo;A. Arefiev;T. Azemoon;T. Aziz;P. Bagnaia;L. Baksay;A. Balandras;R. C. Ball;S. Banerjee;S. Banerjee;K. Banicz;A. Barczyk;R. Barillere;L. Barone;P. Bartalini;M. Basile;R. Battiston;A. Bay;F. Becattini;U. Becker;F. Behner;J. Berdugo;P. Berges;B. Bertucci;B. L. Betev;S. Bhattacharya;M. Biasini;A. Biland;J. J. Blaising;S. C. Blyth;G. J. Bobbink;R. Bock;A. Bohm;L. Boldizsar;B. Borgia;D. Bourilkov;M. Bourquin;S. Braccini;J. G. Branson;V. Brigljevic;F. Brochu;A. Buffini;A. Buijs;J. D. Burger;W. J. Burger;J. Busenitz;A. Button;X. D. Cai;M. Campanelli;M. Capell;G. C. Romeo;G. Carlino;A. M. Cartacci;J. Casaus;G. Castellini;F. Cavallari;N. Cavallo;C. Cecchi;M. Cerrada;F. Cesaroni;M. Chamizo;Y. H. Chang;U. K. Chaturvedi;M. Chemarin;A. Chen;G. Chen;G. M. Chen;H. F. Chen;H. S. Chen;X. Chereau;G. Chiefari;L. Cifarelli;F. Cindolo;C. Civinini;I. Clare;R. Clare;G. Coignet;A. P. Colijn;N. Colino;S. Costantini;F. Cotorobai;B. d. la;A. Csilling;T. S. Dai;J. A. van;R. D'Alessandro;R. d. Asmundis;P. Deglon;A. Degre;K. Deiters;D. d. Volpe;P. Denes;F. DeNotaristefani;A. D. Salvo;M. Diemoz;D. v. Dierendonck;F. D. Lodovico;C. Dionisi;M. Dittmar;A. Dominguez;A. Doria;M. T. Dova;D. Duchesneau;D. Dufournand;P. Duinker;I. Duran;H. E. Mamouni;A. Engler;F. J. Eppling;F. C. Erne;P. Extermann;M. Fabre;R. Faccini;M. A. Falagan;S. Falciano;A. Favara;J. Fay;O. Fedin;M. Felcini;T. Ferguson;F. Ferroni;H. Fesefeldt;E. Fiandrini;J. H. Field;F. Filthaut;P. H. Fisher;I. Fisk;G. Forconi;L. Fredj;K. Freudenreich;C. Furetta;Y. Galaktionov;S. N. Ganguli;P. Garcia-Abia;M. Gataullin;S. S. Gau;S. Gentile;N. Gheordanescu;S. Giagu;S. Goldfarb;Z. F. Gong;M. W. Gruenewald;R. v. Gulik;V. K. Gupta;A. Gurtu;L. J. Gutay;D. Haas;B. Hartmann;A. Hasan;D. Hatzifotiadou;T. Hebbeker;A. Herve;P. Hidas;J. Hirschfelder;H. Hofer;G. Holzner;H. Hoorani;S. R. Hou;I. Iashvili;B. N. Jin;L. W. Jones;P. d. Jong;I. Josa-Mutuberria;R. A. Khan;D. Kamrad;J. S. Kapustinsky;M. Kaur;M. N. Kienzle-Focacci;D. Kim;D. H. Kim;J. K. Kim;S. C. Kim;W. W. Kinnison;J. Kirkby;D. Kiss;W. Kittel;A. Klimentov;A. C. Konig;A. Kopp;I. Korolko;V. Koutsenko;R. W. Kraemer;W. Krenz;A. Kunin;P. Lacentre;P. L. de;I. Laktineh;G. Landi;C. Lapoint;K. Lassila-Perini;P. Laurikainen;A. Lavorato;M. Lebeau;A. Lebedev;P. Lebrun;P. Lecomte;P. Lecoq;P. L. Coultre;H. J. Lee;J. M. Le;R. Leiste;E. Leonardi;P. Levtchenko;C. Li;C. H. Lin;W. T. Lin;F. L. Linde;L. Lista;Z. A. Liu;W. Lohmann;E. Longo;Y. S. Lu;K. Lubelsmeyer;C. Luci;D. Luckey;L. Luminari;W. Lustermann;W. G. Ma;M. Maity;G. Majumder;L. Malgeri;A. Malinin;C. Mana;D. Mangeol;P. Marchesini;G. Marian;J. P. Martin;F. Marzano;G. G. G.;K. Mazumdar;R. R. McNeil;S. Mele;L. Merola;M. Meschini;W. J. Metzger;M. v. der;D. Migani;A. Mihul;H. Milcent;G. Mirabelli;J. Mnich;P. Molnar;B. Monteleoni;T. Moulik;G. S. Muanza;F. Muheim;A. J. M.;S. Nahn;M. Napolitano;F. Nessi-Tedaldi;H. Newman;T. Niessen;A. Nippe;A. Nisati;H. Nowak;Y. D. Oh;G. Organtini;R. Ostonen;C. Palomares;D. Pandoulas;S. Paoletti;P. Paolucci;H. K. Park;I. H. Park;G. Pascale;G. Passaleva;S. Patricelli;T. Paul;M. Pauluzzi;C. Paus;F. Pauss;D. Peach;M. Pedace;Y. J. Pei;S. Pensotti;D. Perret-Gallix;B. Petersen;S. Petrak;D. Piccolo;M. Pieri;P. A. Piroue;E. Pistolesi;V. Plyaskin;M. Pohl;V. Pojidaev;H. Postema;J. Pothier;N. Produit;D. Prokofiev;J. Quartieri;G. Rahal-Callot;N. Raja;P. G. Rancoita;G. Raven;P. Razis;D. Ren;M. Rescigno;S. Reucroft;T. v. Rhee;S. Riemann;K. Riles;A. Robohm;J. Rodin;B. P. Roe;L. Romero;S. Rosier-Lees;S. Roth;J. A. Rubio;D. Ruschmeier;H. Rykaczewski;S. Sakar;J. Salicio;E. Sanchez;M. P. Sanders;M. E. Sarakinos;C. Schafer;V. Schegelsky;S. Schmidt-Kaerst;D. Schmitz;N. Scholz;H. Schopper;D. J. Schotanus;J. Schwenke;G. Schwering;C. Sciacca;D. Sciarrino;L. Servoli;S. Shevchenko;N. Shivarov;V. Shoutko;J. Shukla;E. Shumilov;A. Shvorob;T. Siedenburg;D. Son;B. Smith;P. Spillantini;M. Steuer;D. P. Stickland;A. Stone;H. Stone;B. Stoyanov;A. Straessner;K. Sudhakar;G. Sultanov;L. Z. Sun;H. Suter;J. D. Swain;Z. Szillasi;X. W. Tang;L. Tauscher;L. Taylor;C. Timmermans;S. C. C.;S. M. Ting;S. C. Tonwar;J. Toth;C. Tully;K. L. Tung;Y. Uchida;J. Ulbricht;E. Valente;G. Vesztergombi;I. Vetlitsky;G. Viertel;S. Villa;M. Vivargent;S. Vlachos;H. Vogel;H. Vogt;I. Vorobiev;A. A. Vorobyov;A. Vorvolakos;M. Wadhwa;W. Wallraff;J. C. Wang;X. L. Wang;Z. M. Wang;A. Weber;H. Wilkens;S. X. Wu;S. Wynhoff;L. Xia;Z. Z. Xu;B. Z. Yang;C. G. Yang;H. J. Yang;M. Yang;J. B. Ye;S. C. Yeh;J. M. You;A. Zalite;Y. Zalite;P. Zemp;Y. Zeng;Z. P. Zhang;G. Y. Zhu;R. Y. Zhu;A. Zichichi;F. Ziegler;G. Zilizi. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 453:(1999), pp. 83-93. [10.1016/S0370-2693(99)00274-9]
Inclusive charm production in two-photon collisions at LEP
ADRIANI, OSCAR;BECATTINI, FRANCESCO;D'ALESSANDRO, RAFFAELLO;
1999
Abstract
The cross section of charm production in gamma gamma collisions sigma(e(+)e(-) --> e(+)e(-)c (c) over bar X) is measured at LEP with the L3 detector at centre-of-mass energies from 91 GeV to 183 GeV. Charmed hadrons are identified by electrons and muons from semileptonic decays. The direct process gamma gamma --> c (c) over bar is found to be insufficient to describe the data. The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon, (C) 1999 Published by Elsevier Science B.V. All rights reserved.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.