Measurement of Z-quark, Z-electron couplings and $\sin^2 \theta_{W}$ at CDF

TL;DR

This paper reports on the measurement of Z-quark and Z-electron couplings, as well as the electroweak mixing angle, using forward-backward asymmetry data from proton-antiproton collisions at CDF, providing insights into electroweak interactions.

Contribution

The study presents the first measurement of Z boson couplings to quarks and electrons at CDF using 72 pb^{-1} of data, refining electroweak parameter estimates.

Findings

Measured Z-quark and Z-electron couplings.

Determined the electroweak mixing angle, $oldsymbol{ heta_W}$.

Enhanced understanding of electroweak interactions at hadron colliders.

Abstract

The forward-backward charge asymmetry ($A_{FB}$) of $\ppbar \to e^{+}e^{-} X$ is sensitive to the vector and axial-vector couplings of the initial state quarks and final state leptons. Based on the measurement in $72 pb^{-1}$ of CDF Run II data, we measure the coupling constants of the $Z$ boson to quarks and electron. The electroweak mixing angle, $\sin^2\theta_{W}$, is also measured through its relation to the coupling constants.