Measurement of the tau polarisation at the Z resonance

D. Buskulic,D. Decamp, C. Goy, J.-P. Lees,M.-N. Minard,B. Mours, B. Pietrzyk,R. Alemany,F. Ariztizabal,P. Comas,J. M. Crespo,M. Delfino,E. Fenandez,M. Fernandez-Bosman,V. Gaitan, Ll. Garrido, T. Mattison,A. Pacheco,C. Padilla,A. Pascual, D. Creanza,M. de Palma, A. Farilla,G. Iaselli, G. Maggi,M. Maggi,S. Natali,S. Nuzzo,M. Quattromini,A. Ranieri,G. Raso, F. Ruggieri,G. Selvaggi, L. Silvestris,P. Tempesta, G. Zito,Y. Chai,H. Hu,D. Huang,X. Huang,J. Lin, T. Wang,Y. Xie,D. Xu, R. Xu,J. Zhang,W. Zhao, L. A. T. Bauerdick,E. Blucher,G. Bonvicini, J. Boudreau,D. Casper, H. Drevermann,R. W. Forty,G. Ganis, C. Gay,R. Hagelberg,J. Harvey,S. Haywood,J. Hilgart, R. Jacobsen, B. Jost,J. Knobloch,I. Lehraus, T. Lohse,A. Lusiani,M. Martinez,P. Mato,H. Meinhard, A. Minten, A. Miotto,R. Miquel, H.-G. Moser,P. Palazzi,J. A. Perlas,J.-F. Pusztaszeri,F. Ranjard, G. Redlinger,L. Rolandi, J. Rothberg,T. Ruan,M. Saich,D. Schlatter, M. Schmelling,F. Sefkow,W. Tejessy,H. Wachsmuth, W. Wiedenmann,T. Wildish,W. Witzeling, J. Wotschack, Z. Ajaltouni,F. Badaud,M. Bardadin-Otwinowska,R. El Fellous,A. Falvard, P. Gay, C. Guicheney, P. Henrard,J. Jousset,B. Michel,J.-C. Montret, D. Pallin, P. Perret,F. Podlyski,J. Proriol,F. Prulhière,F. Saadi,T. Fearnley,J. D. Hansen,J. R. Hansen, P. H. Hansen,R. Møllerud,B. S. Nilsson,D. J. Candlin,M. I. Parsons,E. Veitch,L. Moneta, G. Parrini,M. Corden,C. Georgiopoulos,M. Ikeda,J. Lannutti,D. Levinthal,M. Mermikides,L. Sawyer, S. Wasserbaech,A. Antonelli,R. Baldini, G. Bencivenni,G. Bologna,F. Bossi, P. Campana,G. Capon,F. Cerutti, V. Chiarella,B. D'Ettorre-Piazzoli,G. Felici, P. Laurelli,G. Mannocchi, F. Murtas,G. P. Murtas,L. Passalacqua,M. Pepe-Altarelli,P. Picchi,P. Colrain,I. ten Have,J. G. Lynch,W. Maitland,W. T. Morton,C. Raine,P. Reeves,J. M. Scarr,K. Smith, M. G. Smith, A. S. Thompson,R. M. Turnbull,B. Brandl,O. Braun, 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,D. J. Colling,P. J. Dornan,S. Dugeay,A. M. Greene,J. F. Hassaed,N. M. Lieske, J. Nash,D. G. Payne,M. J. Phillips,J. K. Sedgbeer, 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,D. Jackson,N. R. Keemer,M. Nuttall,A. Patel, T. Sloan,S. W. Snow,E. P. Whelan,I. Efthymiopoulos, A. Kyriakis,E. Simopoulou,A. Vayaki,K. Zachariadou,J. Badier, A. Blondel,G. Bonneaud,J. C. Brient,G. Fouque,S. Orteu,A. Rougé,M. Rumpf, R. Tanaka,M. Verderi,H. Videau,S. Adlung,R. Assmann,C. Bauer, W. Blum,D. Brown,P. Cattaneo,B. Dehning,H. Dietl,F. Dydak,M. Frank,A. W. Halley,J. Lauber,G. Lütjens, G. Lutz,W. Männer,R. Richter,H. Rotscheidt, J. Schröder,A. S. Schwarz,R. Settles,H. Seywerd,U. Stierlin,U. Stiegler,R. St. Denis,G. Wolf,J. Boucrot, O. Callot,A. Cordier, M. Davier, L. Duflot, J.-F. Grivaz,Ph. Heusse,D. E. Jaffe, P. Janot,D. W. Kim,F. Le Diberder,J. Lefrançois,A.-M. Lutz,M.-H. Schune,J.-J. Veillet, I. Videau,Z. Zhang, D. Abbaneo, G. Bagliesi,G. Batignani,L. Bosisio,U. Bottigli, C. Bozzi, G. Calderini,M. Carpinelli, M. A. Ciocci,R. Dell'Orso,I. Ferrante,F. Fidecaro,L. Foa, E. Focardi, F. Forti, A. Giassi,M. A. Giorgi,A. Gregorio, F. Ligabue, E. B. Mannelli,P. S. Marrocchesi, A. Messineo, F. Palla,G. Rizzo,G. Sanguinetti,P. Spagnolo,J. Steinberger, R. Tenchini,G. Tonelli,G. Triggiani,C. Vannini,A. Venturi, P. G. Verdini, J. Walsh,A. P. Betteridge,J. M. Carter,M. G. Green,P. V. March,Ll. M. Mir,T. Medcalf,I. S. Quazi,J. A. Strong,L. R. West,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, K. Kleinknecht, J. Raab,B. Renk, H.-G. Sander,H. Schmidt,F. Steeg, S. M. Walther,R. Wanke,B. Wolf,J.-J. Aubert,A. M. Bencheikh, C. Benchouk,A. Bonissent,J. Carr,P. Coyle,J. Drinkard, F. Etienne,D. Nicod,S. Papalexiou,P. Payre, L. Roos,D. Rousseau,P. Schwemling, M. Talby,B. Bloch-Devaux,P. Colas,H. Duarte,W. Kozanecki,E. Lançon,M. C. Lemaire, E. Locci,P. Perez,F. Perrier, J. Rander,J.-F. Renardy, A. Rosowsky,A. Roussarie,J.-P. Schuller, J. Schwindling,D. Si Mohand,B. Vallage,R. P. Johnson, A. M. Litke,G. Taylor,J. Wear,J. G. Ashman,W. Babbage,C. N. Booth,C. Buttar,R. E. Carney,S. Cartwright,F. Combley,F. Hatfield,L. F. Thompson, E. Barberio,A. Böhrer,S. Brandt, G. Cowan, C. Grupen,G. Lutters,F. Rivera,U. Schäfer,R. Della Marina,G. Giannini,B. Gobbo, F. Ragusa, L. Bellantoni,W. Chen,D. Cinabro,J. S. Conway,D. F. Cowen,Z. Feng,D. P. S. Ferguson,Y. S. Gao,J. Grahl,J. L. Harton,R. C. Jared,B. W. LeClaire,C. Lishka, Y. B. Pan, J. R. Pater,Y. Saadi, M. Schmitt, V. Sharma,Z. H. Shi,A. M. Walsh,F. V. Weber,Sau Lan Wu,X. Wu,M. Zheng, G. Zobernig

European Physical Journal C（1993）

引用 216|浏览106

暂无评分

摘要

Using 18.8 pb-1 of data collected in 1990 and 1991, ALEPH has measured the tau polarisation in the decay modes t?ev $\bar v$ , t?µv $\bar v$ , t?p?, t??? and t?a1?, using both the individual tau decay kinematics and the event acollinearity. The measurement of the tau polarisation as a function of the production polar angle yields the two parametersAt andAe, whereAl=2gvlgAl/(gvl)2+(gAl)2] The resultsAt=0.143±0.023 andAe=0.120±0.026 are consistent with the hypothesis of electron-tau universality. Assuming universality yields a measurement of the effective weak mixing angle sin2?weff=0.2332±0.0022.

查看译文

关键词

Field Theory, Elementary Particle, Quantum Field Theory, Polar Angle, Decay Mode

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要