First Measurement of the Left-Right Charge Asymmetry in Hadronic Z Boson Decays and a New Determination of sin2θWeff

Physical Review Letters Volume 78 Issue 1 Page 17-21 published_at 1997-01-06
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Title ( eng )
First Measurement of the Left-Right Charge Asymmetry in Hadronic Z Boson Decays and a New Determination of sin2θWeff
Creator
SLD Collaboration
Source Title
Physical Review Letters
Volume 78
Issue 1
Start Page 17
End Page 21
Abstract
We present the first measurement of the left-right charge asymmetry AQobs in hadronic Z boson decays. This was performed at Ec.m. = 91.27 GeV with the SLD at the SLAC Linear Collider with a polarized electron beam. Using 89 838 events we obtain AQobs = 0.225±0.056±0.019, which leads to a measurement of the electron left-right asymmetry parameter, Ae = 0.162±0.041±0.014, and sin2θWeff = 0.2297±0.0052±0.0018. Also, the AQobs measurement combined with the left-right cross section asymmetry determines Ae independent of the value of the electron-beam polarization.
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 1997-01-06
Rights
Copyright (c) 1997 American Physical Society.
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.78.17
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.78.17