A significant charge asymmetry is observed in the hadronic Z decays with the ALEPH detector at LEP. The asymmetry expressed in terms of the difference in momentum weighted charges in the two event hemispheres is measured to be <Qforward>−<Qbackward>= −0.0084±0.0015 (stat.) ±0.0004 (exp. sys.). In the framework of the standard model this can be interpreted as a measurement of the effective electroweak mixing angle, sin2Ow (Mz2=0.2300±0.0034 (stat.) ±0.0010 (exp. sys.) ±0.0038 (theor. sys.) or of the ratio of the vector to axual- vector coupling costants of the electron, gvegAe=+0.073±0.024.
Measurement of charge asymmetry in hadronic Z decays / D. Decamp;B. Deschizeaux;C. Goy;J.-P. Less;M.-N. Minard;R. Alemany;J.M. Crespo;M. Delfino;E. Fernandez;V. Gaitan;Ll. Garrido;P. Mato;Ll.M. Mir;A. Pacheco;M.G. Catanesi;D. Creanza;M. de 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;X. Huang;J. Lin;J. Lou;C. Qiao;T. Ruan;T. Wang;Y. Xie;D. Xu;R. Xu;J. Zhang;W. Zhao;W.B. Atwood;F. Bird;E. Blucher;G. Bonvicini;F. Bossi;D. Brown;T.H. Burnett;H. Drevermann;F. Dydak;R.W. Forty;C. Grab;R. Hagelberg;A. Haywood;J. Hilgart;B. Jost;M. Kasemann;J. Knobloch;A. Lacourt;E. Lançon;I. Lehraus;T. Lohse;A. Marchioro;M. Martinez;J. May;S. Menary;A. Minten;A. Miotto;R. Miquel;H.-G. Moser;J. Nash;P. Palazzi;F. Ranjard;G. Redlinger;A. Roth;J. Rothberg;H. Rotscheidt;R.St. Denis;D. Schlatter;M. Takashima;M. Talby;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;J. Harvey;P. Henrard;J. Jousset;B. Michel;J.-C. Montret;D. Pallin;P. Perret;J. Proriol;F. Prulhiére;G. Stimpfl;J.D. Hansen;J.R. Hansen;P.H. Hansen;R. Møllerud;E.R. Nielsen;B.S. Nilsson;I. Efthymiopoulos;E. Simopoulou;A. Vayaki;J. Badier;A. Blondel;G. Bonneaud;J. Bourotte;F. Braems;J.C. Brient;G. Fouque;A. Gamess;R. Guirlet;S. Orteu;A. Rosowsky;A. Rougé;M. Rumpf;R. Tanaka;H. Videau;D.J. Candlin;E. Veitch;G. Parrini;M. Corden;C. Georgiopoulos;M. Ikeda;J. Lannutti;D. Levinthal;M. Mermikides;L. Sawyer;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;L. Passalacqua;M. Pepe-Altarelli;P. Picchi;P. Zografou;B. Altoon;O. Boyle;A.W. Halley;I. ten Have;J.L. Hearns;J.G. Lynch;W.T. Morton;C. Raine;J.M. Scarr;K. Smith;A.S. Thompson;R.M. Turnbull;B. Brandl;O. Braun;R. Geiges;C. Geweniger;P. Hanke;V. Hepp;E.E. Kluge;Y. Maumary;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;N.M. Lieske;S.J. Patton;D.G. Payne;M.J. Phillips;J.K. Sedgbeer;G. Taylor;I.R. Tomalin;A.G. Wright;P. Girtler;D. Kuhn;G. Rudolph;C.K. Bowdery;T.J. Brodbeck;A.J. Finch;F. Foster;G. Hughes;N.R. Keemer;M. Nuttall;A. Patel;B.S. Rowlingson;T. Sloan;S.W. Snow;E.P. Whelan;T. Barczewski;L.A.T. Bauerdick;K. Kleinknecht;B. Renk;S. Roehn;A.-G. Sander;M. Schmelling;H. Schmidt;F. Steeg;J.-P. Albanese;J.-J. Aubert;C. Benchouk;V. Bernard;A. Bonissent;D. Courvoisier;F. Etienne;S. Papalexiou;P. Payre;B. Pietrzyk;Z. Qian;H. Becker;W. Blum;P. Cattaneo;G. Cowan;B. Dehning;H. Dietl;M. Fernandez-Bosman;T. Hansl-Kozanecka;A. Jahn;W. Kozanecki;E. Lange;J. Lauber;G. Lütjens;G. Lutz;W. Männer;Y. Pan;R. Richter;J. Schröder;A.S. Schwarz;R. Settles;U. Stierlin;J. Thomas;G. Wolf;V. Bertin;J. Boucrot;O. Callot;X. Chen;A. Cordier;M. Davier;G. Ganis;J.-F. Grivaz;Ph. Heusse;P. Janot;D.W. Kim;F. Le Diberber;J. Lefrançois;A.-M. Lutz;J.-J. Veillet;I. Videau;Z. Zhang;F. Zomer;S.R. Amendolia;G. Bagliesi;G. Bagliesi;G. Batignani;L. Bosisio;U. Bottigli;C. Bradaschia;M. Carpinelli;M.A. Ciocci;R. Dell'Orso;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;L. Moneta;F. Palla;G. Sanguinetti;J. Steinberger;R. Tenchini;G. Tonelli;G. Triggiani;C. Viannini;A. Venturi;P.G. Verdini;J. Walsh;J.M. Carter;M.G. Green;P.V. March;T. Medcalf;I.S. Quazi;M.R. Saich;J.A. Strong;R.M. Thomas;L.R. West;T. Wildish;D.R. Botterill;R.W. Clifft;T.R. Edgecock;M. Edwards;S.M. Fisher;T.J. Jones;P.R. Norton;D.P. Salmon;J.C. Thompson;B. Bloch-Devaux;P. Colas;C. Klopfenstein;E. Locci;S. Loucatos;E. Monnier;P. Perez;J.A. Perlas;F. Perrier;J. Rander;J.-F. Renardy;A. Roussarie;J.-P. Schuller;J. Schwindling;B. Vallage;J.G. Ashman;C.N. Booth;C. Buttar;R. Carney;S. Cartwright;F. Combley;M. Dinsdale;M. Dogru;F. Hatfield;J. Martin;D. Parker;P. Reeves;L.F. Thompson;S. Brandt;H. Burkhardt;C. Grupen;H. Meinhard;L. Mirabito;E. Neugebauer;U. Schäfer;H. Seywerd;G. Apollinari;G. Giannini;B. Gobbo;F. Liello;L. Rolandi;U. Stiegler;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. Grahl;J.L. Harton;J.E. Jacobsen;R.C. Jared;R.P. Johnson;B.W. LeClaire;Y.B. Pan;J.R. Pater;Y. Saadi;V. Sharma;A.M. Walsh;J.A. Wear;F.V. Weber;M.H. Whitney;Lan Wu Sau;Z.L. Zhou;G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 259:(1991), pp. 377-388. [10.1016/0370-2693(91)90844-G]
Measurement of charge asymmetry in hadronic Z decays
FOCARDI, ETTORE;
1991
Abstract
A significant charge asymmetry is observed in the hadronic Z decays with the ALEPH detector at LEP. The asymmetry expressed in terms of the difference in momentum weighted charges in the two event hemispheres is measured to beI documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.