Improved measurements of electroweak parameters from Z decays into fermion pairs

6533b7cffe1ef96bd1259b6a

RESEARCH PRODUCT

Improved measurements of electroweak parameters from Z decays into fermion pairs

Decamp D Deschizeaux B Goy C Lees Jp Minard Mn Alemany R Crespo Jm Delfino M Fernandez E Gaitan V Garrido L Mir Lm Pacheco A Catanesi Mg Creanza D Depalma M Farilla A Iaselli G Maggi G Maggi M Natali S Nuzzo S Quattromini M Ranieri A Raso G Romano F Ruggieri F Selvaggi G Silvestris L Tempesta P Zito G Gao Y Hu H Huang D Huang X Lin J Lou J Qiao C Ruan T Wang T Xie Y Xu D Xu R Zhang J Zhao W Atwood Wb Bauerdick Lat Bird F Blucher E Bonvicini G Bossi F Boudreau J Brown D Burnett Th Drevermann H Forty Rw Grab C Hagelberg R Haywood S Hilgart J Jost B Kasemann M Knobloch J Lacourt A Lancon E Lehraus I Lohse T Lusiani A Marchioro A Martinez M Mato P Menary S Minten A Miotto A Miquel R Moser Hg Nash J Palazzi P Ranjard F Redlinger G Roth A Rothberg J Rotscheidt H Saich M Denis Rs Schlatter D Takashima M Talby M Tejessy W Wachsmuth H Wasserbaech S Wheeler S Wiedenmann W Witzeling W Wotschack J Ajaltouni Z Bardadinotwinowska M Elfellous R Falvard A Gay P Harvey J Henrard P Jousset J Michel B Montret Jc Pallin D Perret P Proriol J Prulhiere F Stimpfl G Hansen Jd Hansen Jr Hansen Ph Mollerud R Nilsson Bs Efthymiopoulos I Simopoulou E Vayaki A Badier J Blondel A Bonneaud G Bourotte J Braems F Brient Jc Fouque G Gamess A Guirlet R Orteu S Rosowsky A Rouge A Rumpf M Tanaka R Videau H Candlin Dj Veitch E Parrini G Corden M Georgiopoulos C Ikeda M Lannutti J Levinthal D Mermikides M Sawyer L Antonelli A Baldini R Bencivenni G Bologna G Campana P Capon G Cerutti F Chiarella V Dettorrepiazzoli B Felici G Laurelli P Mannocchi G Murtas F Murtas Gp Nicoletti G Passalacqua L Pepealtarelli M Picchi P Zografou P Altoon B Boyle O Halley Aw Tenhave I Hearns Jl Lynch Jg Morton Wt Raine C Scarr Jm Smith K Thompson As Turnbull Rm Brandl B Braun O Geiges R Geweniger C Hanke P Hepp V Kluge Ee Maumary Y Putzer A Rensch B Stahl A Tittel K Wunsch M Belk At Beuselinck R Binnie Dm Cameron W Cattaneo M Dornan Pj Dugeay S Greene Am Hassard Jf Lieske Nm Patton Sj Payne Dg Phillips Mj Sedgbeer Jk Taylor G Tomalin Ir Wright Ag Girtler P Kuhn D Rudolph G Bowdery Ck Brodbeck Tj Finch Aj Foster F Hughes G Keemer Nr Nuttall M Patel A Rowlingson Bs Sloan T Snow Sw Whelan Ep Barczewski T Kleinknecht K Raab J Renk B Roehn S Sander Hg Schmelling M Schmidt H Steeg F Walther Sm Wolf B Albanese Jp Aubert Jj Benchouk C Bernard V Bonissent A Courvoisier D Etienne F Papalexiou S Payre P Pietrzyk B Qian Z Becker H Blum W Cattaneo P Cowan G Dehning B Dietl H Dydak F Fernandezbosman M Hanslkozanecka T Jahn A Kozanecki W Lange E Lauber J Lutjens G Lutz G Manner W Pan Y Richter R Schroder J Schwarz As Settles R Stierlin U Thomas J Wolf G Bertin V Boucrot J Callot O Chen X Cordier A Davier M Ganis G Grivaz Jf Heusse P Janot P Kim Dw Lediberder F Lefrancois J Lutz Am Veillet Jj Videau I Zhang Z Zomer F Abbaneo D Amendolia Sr Bagliesi G Batignani G Bosisio L Bottigli U Bradaschia C Massimo Carpinelli Ciocci Ma Dellorso R Ferrante I Fidecaro F Foa L Focardi E Forti F Gatto C Giassi A Giorgi Ma Ligabue F Mannelli Eb Marrocchesi Ps Messineo A Moneta L Palla F Sanguinetti G Steinberger J Tenchini R Tonelli G Triggiani G Vannini C Venturi A Verdini Pg Walsh J Carter Jm Green Mg March Pv Medcalf T Quazi Is Strong Ja Thomas Rm West Lr Wildish T Botterill Dr Clifft Rw Edgecock Tr Edwards M Fisher Sm Jones Tj Norton Pr Salmon Dp Thompson Jc Blochdevaux B Colas P Klopfenstein C Locci E Loucatos S Monnier E Perez P Perlas Ja Perrier F Rander J Renardy Jf Roussarie A Schuller Jp Schwindling J Vallage B Ashman Jg Booth Cn Buttar C Carney R Cartwright S Combley F Dinsdale M Dogru M Hatfield F Martin J Parker D Reeves P Thompson Lf Barberio E Brandt S Burkhardt H Grupen C Meinhard H Mirabito L Schafer U Seywerd H Apollinari G Giannini G Gobbo B Liello F Ragusa F Rolandi L Stiegler U Bellantoni L Chen X Cinabro D Conway Js Cowen Df Feng Z Ferguson Dps Gao Ys Grahl J Harton Jl Jacobsen Je Jared Rc Johnson Rp Leclaire Bw Pan Yb Pater Jr Saadi Y Sharma V Shi Zh Tang Yh Walsh Am Wear Ja Weber Fv Whitney Mh Wu Sl Zobernig G.

subject

Quark Physics Particle physics Physics and Astronomy (miscellaneous)Electron–positron annihilation High Energy Physics::Phenomenology Electroweak interaction Elementary particle Weinberg angle Fermion ALEPH detector Nuclear physics High Energy Physics::Experiment Neutrino Engineering (miscellaneous)Particle Physics - Experiment Lepton

description

The properties of the Z resonance are measured on the basis of 190000 Z decays into fermion pairs collected with the ALEPH detector at LEP. Assuming lepton universality, M(Z) = (91.182 +/- 0.009exp +/- 0.020L;P) GeV, GAMMA(Z) = (2484 +/- 17) MeV, sigma(had)0 = (41.44 +/- 0.36) nb, and GAMMA(had)/GAMMA(ll) = 21.00 +/- 0.20. The corresponding number of light neutrino species is 2.97 +/- 0.07. The forward-backward asymmetry in leptonic decays is used to determine the ratio of vector to axial-vector coupling constants of leptons: g(V)2(M(Z)2)/g(A)2(M(Z)2) = 0.0072 +/- 0.0027. Combining these results with ALEPH results on quark charge and bbBAR asymmetries, and tau-polarization, sin2 theta(W)(M(Z)2) = 0.2312 +/- 0.0018. In the context of the Minimal Standard Model, limits are placed on the top-quark mass.

year	journal	country	edition	language
1992-01-01

10.1007/bf01483868 http://hdl.handle.net/10281/390439