A precise measurement of the left-right asymmetry of Z Boson production at the SLAC linear collider

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We present a precise measurement of the left-right cross section asymmetry of Z boson production (A{sub LR}) observed in 1993 data at the SLAC linear collider. The A{sub LR} experiment provides a direct measure of the effective weak mixing angle through the initial state couplings of the electron to the Z. During the 1993 run of the SLC, the SLD detector recorded 49,392 Z events produced by the collision of longitudinally polarized electrons on unpolarized positrons at a center-of-mass energy of 91.26 GeV. A Compton polarimeter measured the luminosity-weighted electron polarization to be (63.4{+-}1.3)%. ALR was measured to be 0.1617{+-}0.0071(stat.){+-}0.0033(syst.), ... continued below

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173 p.

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Creator: Unknown. September 1, 1994.

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  • Stanford University
    Publisher Info: Stanford Univ., CA (United States)
    Place of Publication: California

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Description

We present a precise measurement of the left-right cross section asymmetry of Z boson production (A{sub LR}) observed in 1993 data at the SLAC linear collider. The A{sub LR} experiment provides a direct measure of the effective weak mixing angle through the initial state couplings of the electron to the Z. During the 1993 run of the SLC, the SLD detector recorded 49,392 Z events produced by the collision of longitudinally polarized electrons on unpolarized positrons at a center-of-mass energy of 91.26 GeV. A Compton polarimeter measured the luminosity-weighted electron polarization to be (63.4{+-}1.3)%. ALR was measured to be 0.1617{+-}0.0071(stat.){+-}0.0033(syst.), which determines the effective weak mixing angle to be sin {sup 2}{theta}{sub W}{sup eff} = 0.2292{+-}0.0009(stat.){+-}0.0004(syst.). This measurement of A{sub LR} is incompatible at the level of two standard deviations with the value predicted by a fit of several other electroweak measurements to the Standard Model.

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173 p.

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INIS; OSTI as DE95014375

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  • Other Information: PBD: Sep 1994

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  • Other: DE95014375
  • Report No.: SLAC--452
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/108112 | External Link
  • Office of Scientific & Technical Information Report Number: 108112
  • Archival Resource Key: ark:/67531/metadc626033

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 1994

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 17, 2017, 6:05 p.m.

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A precise measurement of the left-right asymmetry of Z Boson production at the SLAC linear collider, report, September 1, 1994; California. (digital.library.unt.edu/ark:/67531/metadc626033/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.