In 431 000 hadronicZ decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of bb and cc events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at theZ mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR (b−vX) and BR (bbb asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2theta W eff =0.2333±
Heavy flavour production and decay with prompt leptons in the ALEPH detector / D. Buskulic;D. Casper;I. Bonis;D. Decamp;P. Ghez;C. Goy;J. -P. Lees;M. -N. Minard;P. Odier;B. Pietrzyk;F. Ariztizabal;P. Comas;J. M. Crespo;I. Efthymiopoulos;E. Fernandez;M. Fernandez-Bosman;V. Gaitan;Ll. Garrido;M. Martinez;T. Mattison;S. Ortreu;A. Pacheco;C. Padilla;A. Pascual;D. Creanza;M. Palma;A. Farilla;G. Iaselli;G. Maggi;N. Marinelli;S. Natali;S. Nuzzo;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;Y. Chai;D. Huang;X. Huang;J. Lin;T. Wang;Y. Xie;D. Xu;R. Xu;J. Zhang;L. Zhang;W. Zhao;G. Bonvicini;J. Boudreau;H. Drevermann;R. W. Forty;G. Ganis;C. Gay;M. Girone;R. Hagelberg;J. Harvey;J. Hilgart;R. Jacobsen;B. Jost;J. Knobloch;I. Lehraus;M. Maggi;C. Markou;P. Mato;H. Meinhard;A. Minten;R. Miquel;P. Palazzi;J. R. Pater;J. A. Perlas;P. Perrodo;J. -F. Pusztaszeri;F. Ranjard;L. Rolandi;J. Rothberg;T. Ruan;M. Saich;D. Schlatter;M. Schmelling;F. Sefkow;W. Tejessy;I. R. Tomalin;R. Veenhof;H. Wachsmuth;S. Wasserbaech;W. Wiedenmann;T. Wildish;W. Witzeling;J. Wotschack;Z. Ajaltouni;M. Bardadin-Otwinowska;A. Barres;C. Boyer;A. Falvard;P. Gay;C. Guicheney;P. Henrard;J. Jousset;B. Michel;J. -C. Montret;D. Pallin;P. Perret;F. Podlyski;J. Proriol;F. Saadi;T. Fearnley;J. B. Hansen;J. D. Hansen;J. R. Hansen;P. H. Hansen;S. D. Johnson;R. Møllerud;B. S. Nilsson;A. Kyriakis;E. Simopoulou;I. Siotis;A. Vayaki;K. Zachariadou;J. Badier;A. Blondel;G. Bonneaud;J. C. Brient;B. Bourdon;G. Fouque;L. Passalacqua;A. Rougé;M. Rumpf;R. Tanaka;M. Verderi;H. Videau;D. J. Candlin;M. I. Parsons;E. Veitch;E. Focardi;L. Moneta;G. Parrini;M. Corden;M. Delfino;C. Georgiopoulos;D. E. Jaffe;D. Levinthal;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;M. Pepe-Altarelli;S. Salomone;P. Colrain;I. Have;I. G. Knowles;J. G. Lynch;W. Maitland;W. T. Morton;C. Raine;P. Reeves;J. M. Scarr;K. Smith;M. G. Smith;A. S. Thompson;S. Thorn;R. M. Turnbull;U. Becker;O. Braun;C. Geweniger;P. Hanke;V. Hepp;E. E. Kluge;A. Putzer;B. Rensch;M. Schmidt;H. Stenzel;K. Tittel;M. Wunsch;R. Beuselinck;D. M. Binnie;W. Cameron;M. Cattaneo;D. J. Colling;P. J. Dornan;J. F. Hassard;N. Konstantinidis;A. Moutoussi;J. Nash;D. G. Payne;G. Martin;J. K. Sedgbeer;A. G. Wright;P. Girtler;D. Kuhn;G. Rudolph;R. Vogl;C. K. Bowdery;T. J. Brodbeck;A. J. Finch;F. Foster;G. Hughes;D. Jackson;N. R. Keemer;M. Nuttall;A. Patel;T. Sloan;S. W. Snow;E. P. Whelan;A. Galla;A. M. Greene;K. Kleinknecht;J. Raab;B. Renk;H. -G. Sander;H. Schmidt;S. M. Walther;R. Wanke;B. Wolf;A. M. Bencheikh;C. Benchouk;A. Bonissent;D. Calvet;J. Carr;P. Coyle;C. Diaconu;F. Etienne;D. Nicod;P. Payre;L. Roos;D. Rousseau;P. Schwemling;M. Talby;S. Adlung;R. Assmann;C. Bauer;W. Blum;D. Brown;P. Cattaneo;B. Dehning;H. Dietl;F. Dydak;M. Frank;A. W. Halley;K. Jakobs;J. Lauber;G. Lütjens;G. Lutz;W. Männer;H. -G. Moser;R. Richter;J. Schröder;A. S. Schwarz;R. Settles;H. Seywerd;U. Stierlin;U. Stiegler;R. St. Denis;G. Wolf;R. Alemany;J. Boucrot;O. Callot;A. Cordier;M. Davier;L. Duflot;J. -F. Grivaz;Ph. Heusse;P. Janot;D. W. Kim;F. Diberder;J. Lefrançois;A. -M. Lutz;G. Musolino;M. -H. Schune;J. -J. Veillet;I. Videau;D. Abbaneo;G. Bagliesi;G. Batignani;U. Bottigli;C. Bozzi;G. Calderini;M. Carpinelli;M. A. Ciocci;V. Ciulli;R. Dell'Orso;I. Ferrante;F. Fidecaro;L. Foa;F. Forti;A. Giassi;M. A. Giorgi;A. Gregorio;F. Ligabue;A. Lusiani;P. S. Marrocchesi;E. B. Martin;A. Messineo;F. Palla;G. Rizzo;G. Sanguinetti;P. Spagnolo;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;A. Valassi;C. Vannini;A. Venturi;P. G. Verdini;J. Walsh;A. P. Betteridge;Y. Gao;M. G. Green;D. L. Johnson;P. V. March;T. Medcalf;Ll. M. Mir;I. S. Quazi;J. A. Strong;V. Bertin;D. R. Botterill;R. W. Clifft;T. R. Edgecock;S. Haywood;M. Edwards;P. R. Norton;J. C. Thompson;B. Bloch-Devaux;P. Colas;H. Duarte;S. Emery;W. Kozanecki;E. Lançon;M. C. Lemaire;E. Locci;B. Marx;P. Perez;J. Rander;J. -F. Renardy;A. Rosowsky;A. Roussarie;J. -P. Schuller;J. Schwindling;D. Mohand;B. Vallage;R. P. Johnson;A. M. Litke;G. Taylor;J. Wear;W. Babbage;C. N. Booth;C. Buttar;S. Cartwright;F. Combley;I. Dawson;L. F. Thompson;A. Böhrer;S. Brandt;G. Cowan;E. Feigl;C. Grupen;G. Lutters;J. Minguet-Rodriguez;F. Rivera;P. Saraiva;U. Schäfer;L. Smolik;L. Bosisio;R. Della Marina;G. Giannini;B. Gobbo;L. Pitis;F. Ragusa;L. Bellantoni;W. Chen;J. S. Conway;Z. Feng;D. P. S. Ferguson;Y. S. Gao;J. Grahl;J. L. Harton;O. J. Hayes;H. Hu;J. M. Nachtman;Y. B. Pan;Y. Saadi;M. Schmitt;I. Scott;V. Sharma;J. D. Turk;A. M. Walsh;F. V. Weber;Sau Lan Wu;X. Wu;J. M. Yamartino;M. Zheng;G. Zobernig. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - ELETTRONICO. - 62:(1994), pp. 179-198. [10.1007/BF01560237]
Heavy flavour production and decay with prompt leptons in the ALEPH detector
FOCARDI, ETTORE;CIULLI, VITALIANO;
1994
Abstract
In 431 000 hadronicZ decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of bb and cc events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at theZ mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR (b−vX) and BR (bbb asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2theta W eff =0.2333±I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.