Bury Marcin, Prokudin Alexei, Vladimirov Alexey
Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany.
Division of Science, Penn State University Berks, Reading, Pennsylvania 19610, USA.
Phys Rev Lett. 2021 Mar 19;126(11):112002. doi: 10.1103/PhysRevLett.126.112002.
We perform the global analysis of polarized semi-inclusive deep inelastic scattering (SIDIS), pion-induced polarized Drell-Yan (DY) process, and W^{±}/Z boson production data and extract the Sivers function for u, d, s and for sea quarks. We use the framework of transverse momentum dependent factorization at next-to-next-to-next-to leading order (N^{3}LO) accuracy. The Qiu-Sterman function is determined in a model independent way from the extracted Sivers function. We also evaluate the significance of the predicted sign change of the Sivers function in DY process with respect to SIDIS.
我们对极化半单举深度非弹性散射（SIDIS）、π介子诱发的极化德雷尔-杨（DY）过程以及W⁺/Z玻色子产生数据进行了全局分析，并提取了u、d、s夸克以及海夸克的西弗斯函数。我们使用了次下-次下-领头阶（N³LO）精度的横向动量依赖因子化框架。丘-斯特曼函数以与模型无关的方式从提取的西弗斯函数中确定。我们还评估了DY过程中预测的西弗斯函数符号变化相对于SIDIS的重要性。
