Precise measurement of the left-right cross section asymmetry in Z boson production by E{sup +}e{sup {minus}} collisions

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The authors present a precise measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by e{sup +}e{sup {minus}} collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0 {+-} 1.1)%. Using a sample of 49,392 Z decays, they measure A{sub LR} to be 0.1628 {+-} 0.0071 (stat.) {+-} 0.0028(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.). They combine this result ... continued below

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4 p.

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Lath, A. & Collaboration, SLD September 1, 1994.

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The authors present a precise measurement of the left-right cross section asymmetry (A{sub LR}) for Z boson production by e{sup +}e{sup {minus}} collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0 {+-} 1.1)%. Using a sample of 49,392 Z decays, they measure A{sub LR} to be 0.1628 {+-} 0.0071 (stat.) {+-} 0.0028(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.). They combine this result with the result obtained in 1992 and obtain sin{sup 2} {theta}{sub W}{sup eff} = 0.2294 {+-} 0.0010, which constitutes the best measurement of sin{sup 2} {theta}{sub W}{sup eff} in a single experiment presently available.

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4 p.

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INIS; OSTI as DE95008591

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  • 8. meeting Division of Particles and Fields of the American Physical Society, Albuquerque, NM (United States), 2-6 Aug 1994

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  • Other: DE95008591
  • Report No.: SLAC-PUB--6667
  • Report No.: CONF-940816--90
  • Grant Number: AC03-76SF00515
  • DOI: 10.2172/108113 | External Link
  • Office of Scientific & Technical Information Report Number: 28393
  • Archival Resource Key: ark:/67531/metadc670812

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  • September 1, 1994

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 2, 2016, 5:44 p.m.

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Lath, A. & Collaboration, SLD. Precise measurement of the left-right cross section asymmetry in Z boson production by E{sup +}e{sup {minus}} collisions, article, September 1, 1994; Menlo Park, California. (digital.library.unt.edu/ark:/67531/metadc670812/: accessed July 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.