Tau leptonic branching ratios

descriptionPublicationkeyboard_double_arrow_right Article 10 May 1996 Italy, Italy, Italy, Italy, Italy, Denmark, Italy, Italy, France, Greece, Italy Publisher:Springer Science and Business Media LLCJournal:Zeitschrift f�r Physik C Particles and Fields, volume 70, pages 561-577 (issn: 0170-9739, eissn: 1431-5858,

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Authors: D. Buskulic; D. Casper; I. DeBonis; D. Decamp; P. Ghez; C. Goy; J. P. Lees; +193 Authors

D. Buskulic; D. Casper; I. DeBonis; D. Decamp; P. Ghez; C. Goy; J. P. Lees; A. Lucotte; M. N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. FernandezBosman; V. Gaitan; L. Garrido; M. Martinez; S. Orteu; A. Pacheco; C. Padilla; F. Palla; A. Pascual; J. A. Perlas; F. Sanchez; F. Teubert; A. Colaleo; D. Creanza; M. dePalma; A. Farilla; G. Gelao; M. Girone; G. Iaselli; G. Maggi; M. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; X. Huang; J. Lin; Q. Ouyang; T. Wang; Y. Xie; R. Xu; S. Xue; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; M. Cattaneo; P. Comas; P. Coyle; H. Drevermann; A. Engelhardt; R. W. Forty; M. Frank; R. Hagelberg; J. Harvey; R. Jacobsen; P. Janot; B. Jost; E. Kneringer; J. Knobloch; I. Lehraus; C. Markou; E. B. Martin; P. Mato; A. Minten; R. Miquel; T. Oest; P. Palazzi; J. R. Pater; J. F. Pusztaszeri; F. Ranjard; P. Rensing; L. Rolandi; D. Schlatter; M. Schmelling; O. Schneider; W. Tejessy; I. R. Tomalin; A. Venturi; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. BardadinOtwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; S. Monteil; J. C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; J. M. Rossignol; F. Saadi; T. Fearnley; J. B. Hansen; J. D. Hansen; J. R. Hansen; P. H. Hansen; B. S. Nilsson; A. Kyriakis; E. Simopoulou; I. Siotis; A. Vayaki; K. Zachariadou; A. Blondel; G. Bonneaud; J. C. Brient; P. Bourdon; L. Passalacqua; A. Rouge; M. Rumpf; R. Tanaka; A. Valassi; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Focardi; G. Parrini; M. Corden; M. Delfino; C. Georgiopoulos; D. E. Jaffe; A. Antonelli; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; M. PepeAltarelli; S. J. Dorris; A. W. Halley; I. tenHave; I. G. Knowles; J. G. Lynch; W. T. Morton; V. OShea; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; F. Thomson; S. Thorn; R. M. Turnbull; U. Becker; O. Braun; C. Geweniger; G. Graefe; P. Hanke; V. Hepp; E. E. Kluge; A. Putzer; B. Rensch; M. Schmidt; J. Sommer; H. Stenzel; K. Tittel; S. Werner; M. Wunsch; R. Beuselinck; D. M. Binnie; W. Cameron; D. J. Colling; P. J. Dornan; N. Konstantinidis; L. Moneta; A. Moutoussi; J. Nash; G. SanMartin; J. K. Sedgbeer;

doi: 10.1007/s002880050133

handle: 2434/176885 , 10281/390211 , 11365/38025 , 11568/828569 , 11589/888 , 11384/2961 , 2158/770646 , 2158/638502 , 11586/59733

Tau leptonic branching ratios

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Abstract

A sample of 62249 tau-pair events is selected from data taken with the ALEPH detector in 1991, 1992 and 1993. The measurement of the branching fractions for tau decays into electrons and muons is presented with emphasis on the study of systematic effects from selection, particle identification and decay classification. The results obtained are: B-e=17.79+/-0.12(stat)+/-0.06(syst)(%) and B-mu=17.31+/-0.11(stat)+/-0.05(syst)(%). Combined with the most recent ALEPH determination of the tau lifetime, these results provide a relative measurement of the leptonic couplings in the weak charged current for transverse W bosons: g(mu)/g(e)=1.0002+/-0.0051 and g(tau)/g(mu)=0.9943+/-0.0065.

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Italy, Italy, Italy, Italy, Italy, Denmark, Italy, Italy, France, Greece, Italy

Related Organizations

University of Trieste
Italy
Autonomous University of Barcelona
Spain
University of Copenhagen
Denmark
University of Turin
Italy
University of Manchester
United Kingdom

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Keywords

[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]

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