在\sqrt{s} =1.96 TeV下利用前后向电荷不对称性测量p \bar{p} -> Z/γ^{*} -> e^{+}e^{-}事例（L=5.0 fb^{-1}）中的sin ^2 θ_{eff}^{lept}和Z-轻夸克耦合
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
摘要：
我们测量了157，553个$p\bar{p} \rightarrow Z/γ^{*} \rightarrow e^+e^-$相互作用中前后向电荷不对称性的质量依赖性，对应于在费米实验室Tevatron对撞机上以$\sqrt{s}=1.96$ TeV进行的D 0实验收集的积分光度为5.0 fb的$^{-1}$。从这个主要涉及第一代夸克的过程中提取的有效弱混合角（$\sin^2θ_{eff}^{lept}$）为$\sin^2θ_{eff}^{lept} = 0.2309 \pm 0.0008 ({stat.}) \pm 0.0006 ({syst.})$。我们还提出了最精确的直接测量的矢量和轴矢量耦合的$u$和$d$夸克的$Z$玻色子。
英文摘要：
We measure the mass dependence of the forward-backward charge asymmetry in 157,553 $p\bar{p} \rightarrow Z/γ^{*} \rightarrow e^+e^-$ 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 ($\sin^2θ_{eff}^{lept}$) from this process involving predominantly the first generation of quarks is extracted as $\sin^2θ_{eff}^{lept} = 0.2309 \pm 0.0008 ({stat.}) \pm 0.0006 ({syst.})$. We also present the most precise direct measurement of the vector and axial-vector couplings of $u$ and $d$ quarks to the $Z$ boson.
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