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,L 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,H Hu,Dan Huang,X Huang, Jian Lin,Jun Lou,Chunming Qiao,T Ruan,Ting Wang,Yuquan Xie,Dong Xu,R Xu,Jianxin Zhang,Wei Zhao, W B Atwood,F Bird,E Blucher,G Bonvicini,F Bossi, Devin L Brown,T H Burnett,H Drevermann, F Dydak,R Forty,C Grab,R Hagelberg,Alan M Haywood, J Hilgart, B Jost,M Kasemann,J Knobloch,A Lacourt,E Lancon,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, Sarah S Wheeler,W Wiedenmann,W Witzeling, J Wotschack, Z Ajaltouni,M Bardadinotwinowska,A Falvard,R El Fellous, P Gay,John T Harvey, P Henrard,J Jousset,B Michel,J C Montret, D Pallin, P Perret,J Proriol,F Prulhiere,G Stimpfl,J D Hansen,P H Hansen,R Mollerud, E R Nielsen,B S Nilsson,I Efthymiopoulos,E Simopoulou,A Vayaki,J Badier, A Blondel,G R Bonneaud,J Bourotte,F Braems,J C Brient,G Fouque,A Gamess,R Guirlet,S Orteu, A Rosowsky, A Rouge,M Rumpf, R Tanaka,H Videau,D J Candlin,E Veitch,G Parrini,M Corden,C Georgiopoulos,Masayuki Ikeda,John J Lannutti,D Levinthal,M Mermikides,L Sawyer,A Antonelli,R Baldini, G Bencivenni,G Bologna, P Campana,G Capon,V Chiarella, B Dettorrepiazzoli,G Felici,P Laurelli,G Mannocchi, F Massimobrancaccio,F Murtas, G P Murtas,G Nicoletti,L Passalacqua,M Pepealtarelli,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 M 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 Patton,D G Payne,M J Phillips,J K Sedgbeer,G N 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, Konrad Kleinknecht,B Renk, S Roehn,A Sander, M Schmelling,H R Schmidt,F Steeg,Jacques Albanese,J J Aubert, C Benchouk,V Bernard,A Bonissent,Delphine S Courvoisier,F Etienne,S Papalexiou,P Payre,B Pietrzyk,Zhaoming Qian,H Becker, W Blum,P W Cattaneo,G Cowan,B Dehning,H Dietl,M Fernandezbosman,T Hanslkozanecka,Andreas Jahn,W Kozanecki,E Lange,J Lauber, G Lutjens, G Lutz,W Manner,R Richter, Johannes Schroder,A S Schwarz, R Settles,U Stierlin, J Thomas,Gregory T Wolf,V Bertin,J Boucrot, O Callot,Xi Chen,A Cordier, M Davier,G Ganis,J F Grivaz, P Heusse,P Janot,D W Kim, F Le Diberber, J Lefrancois,A M Lutz,J J Veillet, I Videau,Z Zhang,F Zomer,S R Amendolia,G Bagliesi,G Batignani,L Bosisio,U Bottigli,C Bradaschia,M Carpinelli,M A Ciocci, R Dellorso,I Ferrante,F Fidecaro,L Foa,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,Julia 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 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 Blochdevaux,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 M Buttar,R E Carney,S Cartwright,F Combley,M Dinsdale,M Dogru,F Hatfield,J P Martin,David Parker,P Reeves,L F Thompson,Scott A Brandt,H Burkhardt, C Grupen,H Meinhard, L Mirabito,E Neugebauer,U Schafer,H Seywerd, G Apollinari,G Giannini,B Gobbo,F Liello,L Rolandi,U Stiegler, L Bellantoni,J Boudreau,D Cinabro,J Conway,D F Cowen,A J Deweerd,Z Feng,D Ferguson,Y S Gao,J Grahl,J L Harton,J Jacobsen,R C Jared,R P Johnson,B W Leclaire,Y B Pan,J R Pater,Y Saadi,V Sharma,A M Walsh,J Wear,F V Weber,M H Whitney,Lan Wu Sau, Z L Zhou, G Zobernig

PHYSICS LETTERS B（1991）

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摘要

A significant charge asymmetry is observed in the hadronic Z decays collected 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 - = - 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, sin2-theta-w(M(z)2) = 0.2300 +/- 0.0034 (stat.) +/- 0.0010 (exp. sys.) +/- 0.0038 (theor. sys.) or of the ratio of the vector to axial-vector coupling constants of the electron, g(v(e))/g(A(e)) = + 0.073 +/- 0.024.

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