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arXiv 1801.06283hep-ex
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Tevatron Run II组合的有效轻子电弱混合角

Tevatron Run II combination of the effective leptonic electroweak mixing angle

CDF Collaboration, D0 Collaboration

备注：
submitted to Phys. Rev. D, 20 pages, 4 figures
发表信息：
Phys. Rev. D 97, 112007 (2018)
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摘要：

在过程$p \bar{p} \rightarrow \ell^+\ell^- + X$中通过中间的$γ^*/Z$玻色子产生的Drell-Yan轻子对具有角分布的不对称性，这与电弱力的自发对称破缺及其中性规范玻色子的混合有关。CDF和D 0实验使用从2001-2011年收集的Tevatron质子-反质子数据集中选择的电子和μ子对测量了有效轻子电弱混合参数$\sin^2θ^{\rm lept}_{\rm eff}$，对应于9-10 fb $^{-1}$的积分光度。这些测量的结合产生了强子对撞机最精确的结果，$\sin^2 θ^{\rm lept}_{\rm eff} = 0.23148 \pm 0.00033$。这一结果与正负电子对撞机的最佳测量结果一致，并且在精度上接近。使用\textsc{zfitter}软件包对壳层上电弱混合参数$\sin^2θ_W$或等效的$W$ -玻色子质量$M_W$进行标准模型推断，得到$\sin^2 θ_W = 0.22324 \pm 0.00033$或等效的$M_W = 80.367 \pm 0.017 \;{\rm GeV}/c^2$。

英文摘要：

Drell-Yan lepton pairs produced in the process $p \bar{p} \rightarrow \ell^+\ell^- + X$ through an intermediate $γ^*/Z$ boson have an asymmetry in their angular distribution related to the spontaneous symmetry breaking of the electroweak force and the associated mixing of its neutral gauge bosons. The CDF and D0 experiments have measured the effective-leptonic electroweak mixing parameter $\sin^2θ^{\rm lept}_{\rm eff}$ using electron and muon pairs selected from the full Tevatron proton-antiproton data sets collected in 2001-2011, corresponding to 9-10 fb$^{-1}$ of integrated luminosity. The combination of these measurements yields the most precise result from hadron colliders, $\sin^2 θ^{\rm lept}_{\rm eff} = 0.23148 \pm 0.00033$. This result is consistent with, and approaches in precision, the best measurements from electron-positron colliders. The standard model inference of the on-shell electroweak mixing parameter $\sin^2θ_W$, or equivalently the $W$-boson mass $M_W$, using the \textsc{zfitter} software package yields $\sin^2 θ_W = 0.22324 \pm 0.00033$ or equivalently, $M_W = 80.367 \pm 0.017 \;{\rm GeV}/c^2$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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