Extraction of the Sivers function from SIDIS, Drell-Yan, and W±/Z boson production data with TMD evolution

Extraction of the Sivers function from SIDIS, Drell-Yan, and W±/Z boson production data with TMD evolution
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使用 TMD 演化从 SIDIS、Drell-Yan 和 W±/Z 玻色子产生数据中提取 Sivers 函数

DOI:
10.1007/jhep05(2021)151
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发表时间:
2021
影响因子:
5.4
通讯作者:
Vladimirov, Alexey
Vladimirov, Alexey
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bury, Marcin;Prokudin, Alexei;Vladimirov, Alexey

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我们在横向动量依赖(TMD)演化的n3lo和NNLO精度下,对现有的极化半包含深度非弹性散射(SIDIS)、极化介子诱导的dll - yan (DY)和W±/Z玻色子产生数据进行了全局拟合,并提取了u、d、s和sea夸克的Sivers函数。通过对提取的Sivers函数进行算子积展开,以与模型无关的方式确定了Qiu-Sterman函数。在分析的基础上,进一步研究了适用区域的估计、非极化分布不确定性的影响、Sivers函数的普适性、正性约束、符号变化关系的重要性以及与现有提取结果的比较。
We perform a global fit of the available polarized Semi-Inclusive Deep Inelastic Scattering (SIDIS), polarized pion-induced Drell-Yan (DY) and W±/Z boson production data at N 3 LO and NNLO accuracy of the Transverse Momentum Dependent (TMD) evolution, and extract the Sivers function for u, d, s and for sea quarks. The Qiu-Sterman function is determined in a model independent way via the operator product expansion from the extracted Sivers function. The analysis is supplemented by additional studies, such as the estimation of applicability region, the impact of the unpolarized distributions’ uncertainties, the universality of the Sivers functions, positivity constraints, the significance of the sign-change relation, and the comparison with the existing extractions.
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