| Resumen |
We measure the mass dependence of the forward-backward charge asymmetry in 157 553 pp →Z/γ ∗ →e + e − interactions, corresponding to 5.0 fb −1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at √s =1.96 TeV. The effective weak mixing angle (θℓeff ) from this process involving predominantly the first generation of quarks is extracted as sin2θℓeff = 0.2309±0.0008(stat.)±0.0006(syst.) . We also present the most precise direct measurement of the vector and axial-vector couplings of u and d quarks to the Z boson. |
