Measurement of charge asymmetry in hadronic Z decays

D Decamp; B Deschizeaux; C Goy; JP Less; MN Minard; R Alemany; JM Crespo; M Delfino; E Fernandez; V Gaitan; L Garrido; P Mato; LM Mir; A Pacheco; MG 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; WB Atwood; F Bird; E Blucher; G Bonvicini; F Bossi; D Brown; TH Burnett; H Drevermann; F Dydak; RW 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; HG Moser; J Nash; P Palazzi; F Ranjard; G Redlinger; A Roth; J Rothberg; H Rotscheidt; RS 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

Journal article

Measurement of charge asymmetry in hadronic Z decays

D Decamp, B Deschizeaux, C Goy, JP Less, MN Minard, R Alemany, JM Crespo, M Delfino, E Fernandez, V Gaitan, L Garrido, P Mato, LM Mir, A Pacheco, MG Catanesi, D Creanza, M de Palma, A Farilla, G Iaselli, G Maggi Show all

Physics Letters B | Published : 1991

DOI: 10.1016/0370-2693(91)90844-G

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 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, 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. © 1991.

University of Melbourne Researchers

G. N. Taylor Author

Grants

Awarded by National Science Foundation

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Keywords

51 Physical Sciences

5106 Nuclear and Plasma Physics

5107 Particle and High Energy Physics