Neutral-current weak interactions at an EIC
Neutral-current weak interactions at an EIC
复制标题
EIC 处的中性电流弱相互作用
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
S. Riordan
中科院分区：
文献类型：
--
作者：
Y. Zhao;A. Deshpande;Jin Huang;K. Kumar;S. Riordan
摘要：提出了未来高能高光度极化电子离子对撞机（EIC）中核子中性电流结构函数测量的模拟研究。一系列新的 $\gamma$γ-Z 干涉结构函数 $F_{1}^{\gamma Z}$F1γZ、$F_{3}^{\gamma Z}$F3γZ、$g_{1}^{\gamma Z}$g1γZ、$g_{5}^{\gamma Z}$g5γZ 通过偏振电子-核深非弹性散射中的宇称破坏不对称性变得可访问（DIS）。在夸克-部分子模型的背景下，它们提供了一种独特的、在某些情况下尚未测量的非极化和极化部分子分布函数的组合。对于各种 EIC 束能量配置，考虑使用电子-质子碰撞对这些结构函数的不确定性预测。还提出了使用电子-氘核碰撞测量弱混合角 $ \sin^{2} \theta_{W}$sin2θW 的不确定性投影，其覆盖的 $ Q^{2}$Q2 比固定目标测量中可访问的高得多。计算中包括 QED 和 QCD 辐射校正以及探测器拖尾效应。
Abstract.A simulation study of measurements of neutral current structure functions of the nucleon at the future high-energy and high-luminosity polarized electron-ion collider (EIC) is presented. A new series of $\gamma$γ-Z interference structure functions, $F_{1}^{\gamma Z}$F1γZ, $F_{3}^{\gamma Z}$F3γZ, $g_{1}^{\gamma Z}$g1γZ, $g_{5}^{\gamma Z}$g5γZ become accessible via parity-violating asymmetries in polarized electron-nucleon deep inelastic scattering (DIS). Within the context of the quark-parton model, they provide a unique and, in some cases, yet-unmeasured combination of unpolarized and polarized parton distribution functions. The uncertainty projections for these structure functions using electron-proton collisions are considered for various EIC beam energy configurations. Also presented are uncertainty projections for measurements of the weak mixing angle $ \sin^{2} \theta_{W}$sin2θW using electron-deuteron collisions which cover a much higher $ Q^{2}$Q2 than that accessible in fixed target measurements. QED and QCD radiative corrections and effects of detector smearing are included with the calculations.