Toward three-dimensional nucleon structures at the Electron-Ion Collider in China: A study of the Sivers function

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Toward three-dimensional nucleon structures at the Electron-Ion Collider in China: A study of the Sivers function

Chunhua Zeng, Tianbo Liu, Peng Sun, and Yuxiang Zhao

Phys. Rev. D 106, 094039 – Published 29 November 2022

Abstract

Transverse momentum-dependent parton distribution functions (TMDs) provide three-dimensional imaging of the nucleon in momentum space. With its fundamental importance in understanding the spin structure of the nucleon, the precise measurement of TMDs is considered 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.

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Received 31 August 2022
Accepted 12 November 2022

DOI:https://doi.org/10.1103/PhysRevD.106.094039

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Color confinement Hard scattering Multiquark bound states Nuclear structure & decays Quantum chromodynamics Quark model Strong interaction

Nuclear Physics

Authors & Affiliations

Chunhua Zeng^1,2,3,*, Tianbo Liu ^4,†, Peng Sun^1,5,‡, and Yuxiang Zhao^1,3,6,§

¹Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu Province 730000, China
²Lanzhou University, Lanzhou, Gansu Province 730000, China
³University of Chinese Academy of Sciences, Beijing 100049, China
⁴Key Laboratory of Particle Physics and Particle Irradiation (MOE), Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong 266237, China
⁵Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, Jiangsu 210023, China
⁶Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079, China

^*zengchunhua@impcas.ac.cn
^†liutb@sdu.edu.cn
^‡pengsun@impcas.ac.cn
^§yxzhao@impcas.ac.cn

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Issue

Vol. 106, Iss. 9 — 1 November 2022

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