[SLAC] [SLAC Pubs and Reports] SLAC-PUB-7307Determination of Electroweak Parameters at the SLC Abstract We present an improved measurement of the left-right cross section asymmetry ($A_{LR}$) for $Z$ boson production by $e^+e^-$ collisions. The measurement was performed at a center-of-mass energy of 91.28 GeV with the SLD detector at the SLAC Linear Collider (SLC) during the 1994-95 running period. The luminosity-weighted average polarization of the SLC electron beam during this run was measured to be (77.23$\pm$0.52)%. Using a sample of 93,644 hadronic $Z^0$ decays, we measure the pole asymmetry $A^{0}_{LR}$ to be 0.1512$\pm 0.0042(stat.)$\pm 0.0011(syst.) which is equivalent to an effective weak mixing angle of 0.23100$\pm 0.00054(stat.)$\pm 0.00014(syst.). We also present a preliminary direct measurement of the $Z^0$-lepton coupling asymmetries $A_e,A_\mu$, and $A_\tau$ extracted from the differential cross section observed in leptonic $Z^0$ decays. We combine these results with our previous $A_{LR}$ measurement to obtain a combined determination of the weak mixing angle of 0.23061$\pm 0.00047. (Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.) Full Text PDF slac-pub-7307 (108 KB) Compressed PostScript slac-pub-7307 (42.4 KB) Alternate download methods: old, ancient* *download methods - technical info techexplorer slac-pub-7307 (6.40 KB) More Information Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database. Please report problems with this file to posting@slac.stanford.edu. The SLAC preprint inventory is provided by the SLAC Technical Publications Department. Page generated 02 May 2001 @ 12:00 PDT by htmlme.pl
We present an improved measurement of the left-right cross section asymmetry ($A_{LR}$) for $Z$ boson production by $e^+e^-$ collisions. The measurement was performed at a center-of-mass energy of 91.28 GeV with the SLD detector at the SLAC Linear Collider (SLC) during the 1994-95 running period. The luminosity-weighted average polarization of the SLC electron beam during this run was measured to be (77.23$\pm$0.52)%. Using a sample of 93,644 hadronic $Z^0$ decays, we measure the pole asymmetry $A^{0}_{LR}$ to be 0.1512$\pm 0.0042(stat.)$\pm 0.0011(syst.) which is equivalent to an effective weak mixing angle of 0.23100$\pm 0.00054(stat.)$\pm 0.00014(syst.). We also present a preliminary direct measurement of the $Z^0$-lepton coupling asymmetries $A_e,A_\mu$, and $A_\tau$ extracted from the differential cross section observed in leptonic $Z^0$ decays. We combine these results with our previous $A_{LR}$ measurement to obtain a combined determination of the weak mixing angle of 0.23061$\pm 0.00047. (Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)
(Equations render on Windows, Mac OS, AIX, Linux, Solaris, and IRIX with the techexplorer plug-in.)
PDF slac-pub-7307 (108 KB) Compressed PostScript slac-pub-7307 (42.4 KB) Alternate download methods: old, ancient* *download methods - technical info techexplorer slac-pub-7307 (6.40 KB)
Full bibliographic data for this document, including its complete author list, is (or soon will be) available from SLAC's SPIRES-HEP Database.