Toward three-dimensional nucleon structures at the Electron-Ion Collider in China: A study of the Sivers function
Toward three-dimensional nucleon structures at the Electron-Ion Collider in China: A study of the Sivers function
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DOI：
10.1103/physrevd.106.094039
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发表时间：
2022-08
影响因子：
5
通讯作者：
C. Zeng;Tianbo Liu;P. Sun;Yuxiang Zhao
中科院分区：
文献类型：
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作者：
C. Zeng;Tianbo Liu;P. Sun;Yuxiang Zhao
横向动量相关的部分子分布函数(TMD)提供了动量空间中核子的三维成像。TMD的精确测量是中国电子-离子对撞机的主要物理课题之一，它对理解核子的自旋结构具有重要意义。本文研究了EICC未来的半包含深度非弹性散射(SIDIS)数据对TMD提取的影响。以Sivers函数为例，我们重新审视了作为模拟EICC数据输入的世界SIDIS数据。通过对世界数据和欧洲国际商会模拟数据的联合分析，我们定量地证明了对于各种夸克类型，特别是对于海夸克，我们可以精确地确定Sivers函数，在欧洲国际商会直接覆盖的区域，$x>；0.005$。
Transverse momentum-dependent parton distribution functions (TMDs) provide three-dimensional imaging of the nucleon in the momentum space. With its fundamental importance in understanding the spin structure of the nucleon, the precise measurement of TMDs is considered as one of the main physics topics of the proposed Electron-Ion Collider in China (EicC). In this paper, we investigate the impact of future semi-inclusive deep inelastic scattering (SIDIS) data from EicC on the extraction of TMDs. Taking the Sivers function as an example, we revisited the world SIDIS data, which serves as the input for the simulated EicC data. By performing a combined analysis of the world data and the EicC simulated data, we quantitatively demonstrate that the Sivers functions can be precisely determined for various quark flavors, especially for sea quarks, in the region, $x>0.005$, directly covered by the EicC.