Measurement of sin2θeff and Z-light quark couplings using the forward-backward charge asymmetry in pp̄→Z/γ *→e+e- events with L=5.0fb -1 at √s=1.96TeV
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We measure the mass dependence of the forward-backward charge asymmetry in 157553 pp̄→Z/γ*→e+e- interactions, corresponding to 5.0fb-1 of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at √s=1.96 TeV. The effective weak mixing angle (θeff) from this process involving predominantly the first generation of quarks is extracted as sin2θeff=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. © 2011 American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 84, n. 1, 2011.
