Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1997-04-24
Phys.Rev.Lett.79:804-808,1997
Physics
High Energy Physics
High Energy Physics - Experiment
10 pages, 1 figure
Scientific paper
10.1103/PhysRevLett.79.804
We present direct measurements of the $Z^0$-lepton coupling asymmetry parameters, $A_e$, $A_\mu$, and $A_\tau$, based on a data sample of 12,063 leptonic $Z^0$ decays collected by the SLD detector. The $Z$ bosons are produced in collisions of beams of polarized $e^-$ with unpolarized $e^+$ at the SLAC Linear Collider. The couplings are extracted from the measurement of the left-right and forward-backward asymmetries for each lepton species. The results are: $A_e=0.152 \pm 0.012 {(stat)} \pm 0.001 {(syst)}$, $A_\mu=0.102 \pm 0.034 \pm 0.002$, and $A_\tau=0.195 \pm 0.034 \pm 0.003$.
Abe Kanshi
Akagi Tasuku
The SLD Collaboration
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