We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with the ALEPH detector at LEP, the Large Electron-Positron storage ring at CERN. We findM Z=(91.193±0.016exp±0.030LEP) GeV, Gamma Z =(2497±31) MeV, sgr had 0 =(41.86±0.66)nb, and for the partial widths Gammainv=(489±24) MeV, Gammahad(1754±27) MeV, Gamma ee =(85.0±1.6)MeV, Gamma mgrmgr =(80.0±2.5) MeV, and Gammatautau=(81.3±2.5) MeV, all in good agreement with the Standard Model. Assuming lepton universality and using a lepton sample without distinction of the final state we measure Gammau=(84.3±1.3) MeV. The forward-backward asymmetry in leptonic decays is used to determine the vector and axial-vector weak coupling constants of leptors,g v 2 (M Z 2 )=(0.12±0.12)×10–2 andg A 2 (M Z 2 )=0.2528±0.0040. The number of light neutrino species isN ngr=2.91±0.13; the electroweak mixing angle is sin2thetaW(M Z 2 )=0.2291±0.0040.

Measurement of electroweak parameters fromZ decays into fermion pairs / D. Decamp;B. Deschizeaux;C. Goy;J. -P. Lees;M. -N. Minard;R. Alemany;J. M. Crespo;M. Delfino;E. Fernandez;V. Gaitan;Ll. Garrido;P. Mato;R. Miquel;Ll. M. Mir;S. Orteu;A. Pacheco;J. A. Perlas;E. Tubau;M. G. Catanesi;D. Creanza;M. Palma;A. Farilla;G. Iaselli;G. Maggi;M. Maggi;S. Natali;S. Nuzzo;M. Quattromini;A. Ranieri;G. Raso;F. Romano;F. Ruggieri;G. Selvaggi;L. Silvestris;P. Tempesta;G. Zito;Y. Gao;H. Hu;D. Huang;S. Jin;J. Lin;T. Ruan;T. Wang;W. Wu;Y. Xie;D. Xu;R. Xu;J. Zhang;W. Zhao;H. Albrecht;W. B. Atwood;F. Bird;E. Blucher;G. Bonvicini;F. Bossi;J. Bourotte;D. Brown;T. H. Burnett;H. Drevermann;F. Dydak;R. W. Forty;C. Grab;R. Hagelberg;S. Haywood;B. Jost;M. Kasemann;G. Kellner;J. Knobloch;A. Lacourt;I. Lehraus;T. Lohse;D. Lüke;A. Marchioro;M. Martinez;J. May;S. Menary;A. Minten;A. Miotto;J. Nash;P. Palazzi;F. Ranjard;G. Redlinger;A. Roth;J. Rothberg;H. Rotscheidt;W. Rüden;R. St. Denis;D. Schlatter;M. Takashima;M. Talby;H. Taureg;W. Tejessy;H. Wachsmuth;S. Wasserbaech;S. Wheeler;W. Wiedenmann;W. Witzeling;J. Wotschack;Z. Ajaltouni;M. Bardadin-Otwinowska;A. Falvard;R. El Fellous;P. Gay;P. Henrard;J. Jousset;B. Michel;J-C. Montret;D. Pallin;P. Perret;J. Proriol;F. Prulhière;J. D. Hansen;J. R. Hansen;P. H. Hansen;R. Møllerud;B. S. Nilsson;G. Petersen;I. Efthymiopoulos;E. Simopoulou;A. Vayaki;J. Badier;A. Blondel;G. Bonneaud;F. Braems;J. C. Brient;G. Fouque;A. Gamess;R. Guirlet;A. Rosowsky;A. Rougé;M. Rumpf;R. Tanaka;H. Videau;I. Videau;D. J. Candlin;G. Parrini;M. Corden;C. Georgiopoulos;M. Ikeda;J. Lannutti;D. Levinthal;M. Mermikides;L. Sawyer;G. Stimpfl;A. Antonelli;R. Baldini;G. Bencivenni;G. Bologna;P. Campana;G. Capon;V. Chiarella;B. D'Ettorre-Piazzoli;G. Felici;P. Laurelli;G. Mannocchi;F. Massimo Brancaccio;F. Murtas;G. P. Murtas;G. Nicoletti;M. Pepe-Altarelli;P. Picchi;P. Zografou;B. Altoon;O. Boyle;A. W. Halley;I. Have;J. L. Hearns;J. G. Lynch;W. T. Morton;C. Raine;J. M. Scarr;K. Smith;A. S. Thompson;B. Brandl;O. Braun;R. Geiges;C. Geweniger;P. Hanke;V. Hepp;E. E. Kluge;Y. Maumary;M. Panter;A. Putzer;B. Rensch;A. Stahl;K. Tittel;M. Wunsch;A. T. Belk;R. Beuselinck;D. M. Binnie;W. Cameron;M. Cattaneo;P. J. Dornan;S. Dugeay;A. M. Greene;J. F. Hassard;S. J. Patton;J. K. Sedgbeer;G. Taylor;I. R. Tomalin;A. G. Wright;P. Girtler;E. Kneringer;D. Kuhn;G. Rudolph;C. K. Bowdery;T. J. Brodbeck;A. J. Finch;F. Foster;G. Hughes;N. R. Keemer;M. Nuttall;B. S. Rowlingson;T. Sloan;S. W. Snow;T. Barczewski;L. A. T. Bauerdick;K. Kleinknecht;B. Renk;S. Roehn;H. G. Sander;M. Schmelling;F. Steeg;J-P. Albanese;J-J. Aubert;C. Benchouk;V. Bernard;A. Bonissent;D. Courvoisier;F. Etienne;S. Papalexiou;P. Payre;B. Puietrzyk;Z. Qian;W. Blum;P. Cattaneo;G. Cowan;B. Dehning;H. Dietl;M. Fernandez-Bosman;M. Frank;A. Jahn;E. Lange;G. Lütjens;G. Lutz;W. Männer;H-G. Moser;Y. Pan;R. Richter;A. S. Schwarz;R. Settles;U. Stiegler;U. Stierlin;J. Thomas;V. Bertin;G. Bouard;J. Boucrot;O. Callot;X. Chen;A. Cordier;M. Davier;G. Ganis;J. -F. Grivaz;Ph. Heusse;P. Janot;V. Journé;D. W. Kim;J. Lefrançois;A. M. Lutz;J. -J. Veillet;Z. Zhang;F. Zomer;S. R. Amendolia;G. Bagliesi;G. Batignani;L. Bosisio;U. Bottigli;C. Bradaschia;M. A. Ciocci;I. Ferrante;F. Fidecaro;L. Foà;E. Focardi;F. Forti;A. Giassi;M. A. Giorgi;F. Ligabue;A. Lusiani;E. B. Mannelli;P. S. Marrocchesi;A. Messineo;F. Palla;G. Sanguinetti;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;J. M. Carter;M. G. Green;P. V. March;T. Medcalf;M. R. Saich;J. A. Strong;R. M. Thomas;T. Wildish;D. R. Botterill;R. W. Clifft;T. R. Edgecock;M. Edwards;S. M. Fisher;J. Harvey;T. J. Jones;P. R. Norton;D. P. Salmon;J. C. Thompson;B. Bloch-Devaux;P. Colas;C. Klopfenstein;E. Lançon;E. Locci;S. Loucatos;L. Mirabito;E. Monnier;P. Perez;F. Perrier;J. Rander;J. -F. Renardy;A. Roussarie;J. -P. Schuller;J. G. Ashman;C. N. Booth;F. Combley;M. Dinsdale;J. Martin;D. Parker;L. F. Thompson;S. Brandt;H. Burkhardt;C. Grupen;H. Meinhard;E. Neugebauer;U. Schäfer;H. Seywerd;G. Apollinari;G. Giannini;B. Gobbo;F. Liello;E. Milotti;L. Rolandi;L. Bellantoni;J. F. Boudreau;D. Cinabro;J. S. Conway;D. F. Cowen;A. J. DeWeerd;Z. Feng;D. P. S. Ferguson;Y. S. Gao;J. L. Harton;J. Hilgart;J. E. Jacobsen;R. C. Jared;R. P. Johnson;B. W. LeClaire;Y. B. Pan;T. Parker;J. R. Pater;Y. Saadi;V. Sharma;J. A. Wear;F. V. Weber;Sau Lan Wu;G. Zobernig. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - ELETTRONICO. - 48:(1990), pp. 365-391. [10.1007/BF01572019]

Measurement of electroweak parameters fromZ decays into fermion pairs

FOCARDI, ETTORE;
1990

Abstract

We report on the properties of theZ resonance from 62 500Z decays into fermion pairs collected with the ALEPH detector at LEP, the Large Electron-Positron storage ring at CERN. We findM Z=(91.193±0.016exp±0.030LEP) GeV, Gamma Z =(2497±31) MeV, sgr had 0 =(41.86±0.66)nb, and for the partial widths Gammainv=(489±24) MeV, Gammahad(1754±27) MeV, Gamma ee =(85.0±1.6)MeV, Gamma mgrmgr =(80.0±2.5) MeV, and Gammatautau=(81.3±2.5) MeV, all in good agreement with the Standard Model. Assuming lepton universality and using a lepton sample without distinction of the final state we measure Gammau=(84.3±1.3) MeV. The forward-backward asymmetry in leptonic decays is used to determine the vector and axial-vector weak coupling constants of leptors,g v 2 (M Z 2 )=(0.12±0.12)×10–2 andg A 2 (M Z 2 )=0.2528±0.0040. The number of light neutrino species isN ngr=2.91±0.13; the electroweak mixing angle is sin2thetaW(M Z 2 )=0.2291±0.0040.
1990
48
365
391
D. Decamp;B. Deschizeaux;C. Goy;J. -P. Lees;M. -N. Minard;R. Alemany;J. M. Crespo;M. Delfino;E. Fernandez;V. Gaitan;Ll. Garrido;P. Mato;R....espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/632089
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