First measurement of the left-right asymmetry in Z boson production - INSPIRE

DataBETA

First measurement of the left-right asymmetry in Z boson production

SLD

Collaboration

May, 1993

13 pages

Published in:

Mod.Phys.Lett.A 8 (1993) 2237-2248

DOI:

10.1142/S0217732393003536

Report number:

SLAC-PUB-6169

Experiments:

SLAC-SLC-SLD

reference search9 citations

Citations per year

Abstract: (WSP)

We present the first measurement of the left-right cross-section asymmetry (ALR) in Z-boson production observed at the SLAC Linear Collider. In 1992 the SLD detector recorded 10 224 Z events produced by the collision of longitudinally polarized electrons with an unpolarized positron beam at a center-of-mass energy of 91.55 GeV. The average electron beam polarization during the run was (22.4 ± 0.6)%. We measure ALR to be 0.100 ± 0.0440 (stat.) ±0.004 (syst.), which determines the effective weak mixing angle to be

\sin^2\theta_W^{\rm {eff}} = 0.2378\pm 0.0056\, ({\rm stat.})\pm 0.0005\, ({\rm syst.})

.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
electron: polarized beam
polarized beam: electron
Z0: electroproduction
electroproduction: Z0
cross section: difference
polarization: asymmetry

References(14)

Figures(0)

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