# Measurement of sin^2\theta_{eff}^{lept} and Z-light quark couplings using the forward-backward charge asymmetry in p\bar{p} -> Z/\gamma^{*} -> e^{+}e^{-} events with L=5.0 fb^{-1} at \sqrt{s}=1.96 TeV

Abstract : We measure the mass dependence of the forward-backward charge asymmetry in 157,553 $p\bar{p} \rightarrow Z/\gamma^{*} \rightarrow e^+e^-$ interactions, corresponding to 5.0 fb$^{-1}$ of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider at $\sqrt{s}=1.96$ TeV. The effective weak mixing angle ($\sin^2\theta_{eff}^{lept}$) from this process involving predominantly the first generation of quarks is extracted as $\sin^2\theta_{eff}^{lept} = 0.2309 \pm 0.0008 ({stat.}) \pm 0.0006 ({syst.})$. We also present the most precise direct measurement of the vector and axial-vector couplings of $u$ and $d$ quarks to the $Z$ boson.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00588689
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, April 26, 2011 - 9:07:07 AM
Last modification on : Thursday, February 25, 2021 - 10:58:32 AM

### Citation

V.M. Abazov, B. Abbott, B.S. Acharya, M. Adams, T. Adams, et al.. Measurement of sin^2\theta_{eff}^{lept} and Z-light quark couplings using the forward-backward charge asymmetry in p\bar{p} -> Z/\gamma^{*} -> e^{+}e^{-} events with L=5.0 fb^{-1} at \sqrt{s}=1.96 TeV. Physical Review D, American Physical Society, 2011, 84, pp.012007. ⟨10.1103/PhysRevD.84.012007⟩. ⟨in2p3-00588689⟩

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