The full statistics of hadronic Z decays collected with the ALEPH detector are analysed to measure, by three methods, the ratio, , of the partial decay width of the Z into quarks to the total hadronic width. One method uses the inclusive and spectra of electrons. The other two use a double-tagging technique to measure independently of the charm-tagging efficiency. In one, the tagging procedure uses the reconstruction of high momentum charmed mesons (, and to detect the charm quarks. In the other, a charm quark is tagged from the 's reconstructed in the decay channel and the other from the slow pion from the decay. The combination of these measurements leads to .
Measurement of the fraction of hadronic Z decays into charm quark pairs / R. Barate;D. Buskulic;D. Decamp;P. Ghez;C. Goy;J. P. Lees;A. Lucotte;E. Merle;M. N. Minard;J. Y. Nief;B. Pietrzyk;R. Alemany;G. Boix;M. P. Casado;M. Chmeissani;J. M. Crespo;M. Delfino;E. Fernandez;M. Fernandez-Bosman;L. Garrido;E. Grauges;A. Juste;M. Martinez;G. Merino;R. Miquel;L. M. Mir;I. C. Park;A. Pascual;J. A. Perlas;I. Riu;F. Sanchez;A. Colaleo;D. Creanza;M. d. Palma;G. Gelao;G. Iaselli;G. Maggi;M. Maggi;S. Nuzzo;A. Ranieri;G. Raso;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;A. Tricomi;G. Zito;X. Huang;J. Lin;Q. Ouyang;T. Wang;Y. Xie;R. Xu;S. Xue;J. Zhang;L. Zhang;W. Zhao;D. Abbaneo;U. Becker;P. Bright-Thomas;D. Casper;M. Cattaneo;V. Ciulli;G. Dissertori;H. Drevermann;R. W. Forty;M. Frank;R. Hagelberg;J. B. Hansen;J. Harvey;P. Janot;B. Jost;I. Lehraus;P. Mato;A. Minten;L. Moneta;A. Pacheco;J. F. Pusztaszeri;F. Ranjard;L. Rolandi;D. Rousseau;D. Schlatter;M. Schmitt;O. Schneider;W. Tejessy;F. Teubert;I. R. Tomalin;H. Wachsmuth;A. Wagner;Z. Ajaltouni;F. Badaud;G. Chazelle;O. Deschamps;A. Falvard;C. Ferdi;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;S. Monteil;J. C. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;P. Rosnet;J. D. Hansen;J. R. Hansen;P. H. Hansen;B. S. Nilsson;B. Rensch;A. Waananen;G. Daskalakis;A. Kyriakis;C. Markou;E. Simopoulou;I. Siotis;A. Vayaki;A. Blondel;G. Bonneaud;J. C. Brient;P. Bourdon;A. Rouge;M. Rumpf;A. Valassi;M. Verderi;H. Videau;E. Focardi;G. Parrini;K. Zachariadou;M. Corden;C. Georgiopoulos;D. E. Jaffe;A. Antonelli;G. Bencivenni;G. Bologna;F. Bossi;P. Campana;G. Capon;F. Cerutti;V. Chiarella;G. Felici;P. Laurelli;G. Mannocchi;F. Murtas;G. P. Murtas;L. Passalacqua;M. Pepe-Altarelli;L. Curtis;A. W. Halley;J. G. Lynch;P. Negus;V. O'Shea;C. Raine;J. M. Scarr;K. Smith;P. Teixeira-Dias;A. S. Thompson;E. Thomson;O. Buchmuller;S. Dhamotharan;C. Geweniger;G. Graefe;P. Hanke;G. Hansper;V. Hepp;E. E. Kluge;A. Putzer;J. Sommer;K. Tittel;S. Werner;M. Wunsch;R. Beuselinck;D. M. Binnie;W. Cameron;P. J. Dornan;M. Girone;S. Goodsir;E. B. Martin;N. Marinelli;A. Moutoussi;J. Nash;J. K. Sedgbeer;P. Spagnolo;M. D. Williams;V. M. Ghete;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;A. P. Betteridge;C. K. Bowdery;P. G. Buck;P. Colrain;G. Crawford;A. J. Finch;F. Foster;G. Hughes;R. W. L.;M. I. Williams;I. Giehl;A. M. Greene;C. Hoffmann;K. Jakobs;K. Kleinknecht;G. Quast;B. Renk;E. Rohne;H. G. Sander;P. v. Gemmeren;C. Zeitnitz;J. J. Aubert;C. Benchouk;A. Bonissent;G. Bujosa;J. Carr;P. Coyle;F. Etienne;O. Leroy;F. Motsch;P. Payre;M. Talby;A. Sadouki;M. Thulasidas;K. Trabelsi;M. Aleppo;M. Antonelli;F. Ragusa;R. Berlich;W. Blum;V. Buscher;H. Dietl;G. Ganis;H. Kroha;G. Lutjens;C. Mannert;W. Manner;H. G. Moser;S. Schael;R. Settles;H. Seywerd;H. Stenzel;W. Wiedenmann;G. Wolf;J. Boucrot;O. Callot;S. Chen;A. Cordier;M. Davier;L. Duflot;J. F. Grivaz;P. Heusse;A. Hocker;A. Jacholkowska;D. W. Kim;F. L. Diberder;J. Lefranccois;A. M. Lutz;M. H. Schune;E. Tournefier;J. J. Veillet;I. Videau;D. Zerwas;P. Azzurri;G. Bagliesi;G. Batignani;S. Bettarini;T. Boccali;C. Bozzi;G. Calderini;M. Carpinelli;M. A. Ciocci;R. Dell'Orso;R. Fantechi;I. Ferrante;L. Foa;F. Forti;A. Giassi;M. A. Giorgi;A. Gregorio;F. Ligabue;A. Lusiani;P. S. Marrocchesi;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;A. Sciaba;R. Tenchini;G. Tonelli;C. Vannini;A. Venturi;P. G. Verdini;G. A. Blair;L. M. Bryant;J. T. Chambers;M. G. Green;T. Medcalf;P. Perrodo;J. A. Strong;J. H. von;D. R. Botterill;R. W. Clifft;T. R. Edgecock;S. Haywood;P. R. Norton;J. C. Thompson;A. E. Wright;B. Bloch-Devaux;P. Colas;S. Emery;W. Kozanecki;E. Lanccon;M. C. Lemaire;E. Locci;P. Perez;J. Rander;J. F. Renardy;A. Roussarie;J. P. Schuller;J. Schwindling;A. Trabelsi;B. Vallage;S. N. Black;J. H. Dann;R. P. Johnson;H. Y. Kim;N. Konstantinidis;A. M. Litke;M. A. McNeil;G. Taylor;C. N. Booth;C. A. J.;S. Cartwright;F. Combley;M. S. Kelly;M. Lehto;J. Reeve;L. F. Thompson;K. Affholderbach;A. Bohrer;S. Brandt;G. Cowan;C. Grupen;P. Saraiva;L. Smolik;F. Stephan;M. Apollonio;L. Bosisio;R. D. Marina;G. Giannini;B. Gobbo;G. Musolino;J. Rothberg;S. Wasserbaech;S. R. Armstrong;E. Charles;P. Elmer;D. P. S.;Y. Gao;S. Gonzalez;T. C. Greening;O. J. Hayes;H. Hu;S. Jin;P. A. McNamara;J. M. Nachtman;J. Nielsen;W. Orejudos;Y. B. Pan;Y. Saadi;I. J. Scott;J. Walsh;S. L. Wu;X. Wu;G. Zobernig. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - ELETTRONICO. - 4:(1998), pp. 557-570. [10.1007/s100529800939]
Measurement of the fraction of hadronic Z decays into charm quark pairs
FOCARDI, ETTORE;CIULLI, VITALIANO;
1998
Abstract
The full statistics of hadronic Z decays collected with the ALEPH detector are analysed to measure, by three methods, the ratio, , of the partial decay width of the Z into quarks to the total hadronic width. One method uses the inclusive and spectra of electrons. The other two use a double-tagging technique to measure independently of the charm-tagging efficiency. In one, the tagging procedure uses the reconstruction of high momentum charmed mesons (, and to detect the charm quarks. In the other, a charm quark is tagged from the 's reconstructed in the decay channel and the other from the slow pion from the decay. The combination of these measurements leads to .I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.