Measurement of the effective weak mixing angle in $p\bar{p}\to Z/{\gamma }^{\ast }\to e^{+}{e}^{-}$ events

Abstract

We present a measurement of the fundamental parameter of the standard model, the weak mixing angle, in $p\bar{p}\to Z/{\gamma }^{\ast }\to e^{+}{e}^{-}$ events at a center of mass energy of 1.96 TeV, using data corresponding to 9.7 fb${}^{-1}$ of integrated luminosity collected by the D0 detector at the Fermilab Tevatron. The effective weak mixing angle is extracted from the forward-backward charge asymmetry as a function of the invariant mass around the Z boson pole. The measured value of $\sin^2θ_{\text{eff}}^{\text{$\ell$}}=0.23147 \pm 0.00047$ is the most precise measurement from light quark interactions to date, with a precision close to the best LEP and SLD results.

submitted to Phys. Rev. Lett

References in corpus (6)

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• Measurement of the shape of the boson rapidity distribution for p\bar{p}-> Z/gamma*-> e+e- +X events produced at sqrt(s) of 1.96 TeV
• Design and Implementation of the New D0 Level-1 Calorimeter Trigger
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• Measurement of sin^2θ_{eff}^{lept} and Z-light quark couplings using the forward-backward charge asymmetry in p\bar{p} -> Z/γ^{*} -> e^{+}e^{-} events with L=5.0 fb^{-1} at \sqrt{s}=1.96 TeV
• Indirect measurement of ${\sin }^2{\theta }_W$ (or $M_W$) using ${\mu }^{+}{\mu }^{-}$ pairs from ${\gamma }^{\ast }/Z$ bosons produced in $p\bar{p}$ collisions at a center-of-momentum energy of 1.96 TeV

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