We present a measurement of the left-right cross-section asymmetry (ALR) for Z boson production by e+e− collisions. The measurement includes the final data taken with the SLD detector at the SLAC Linear Collider during the period 1996–1998. Using a sample of 383487 decays collected during the 1996–1998 runs we measure the pole value of the asymmetry, ALR0, to be 0.15056 ± 0.00239 which is equivalent to an effective weak mixing angle of sin2 θeffW = 0.23107 ± 0.00030. Our result for the complete 1992–1998 data set comprising approximately 537 000 Z decays is sin2 θeffW = 0.23097 ± 0.00027.
ASJC Scopus subject areas
- Physics and Astronomy(all)