A High precision measurement of the left-right Z boson cross-section asymmetry

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 (SLC) during the period 1996-1998. Using a sample of 383,487 Z 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 sin2th(eff) = 0.23107+-0.00030. Our result for the complete 1992-1998 dataset comprising 537 thousand Z decays is sin2th(eff) = 0.23097+-0.00027.

electron positron: colliding beams
electron positron: annihilation
electron: polarized beam
polarization: longitudinal
Z0: electroproduction
Z0: decay
polarization: asymmetry
Weinberg angle
SLD
experimental results

References(18)

Figures(0)

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