2024/03/19 by Ke Yang, Tianbo Liu, Yang, Ke +7
Engineering · #Advanced Surface Polishing Techniques #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #Particle Accelerators and Free-Electron Lasers #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2403.12795
openalex publication_date 2024/03/19 · openalex created_date 2024/03/21 · openalex updated_date 2026/07/28
We present a global analysis of the trans-helicity worm-gear distribution function, g1T^⊥, by fitting the longitudinal-transverse double spin asymmetry data of the semi-inclusive deep inelastic scattering. The analysis is performed within the framework of transverse momentum dependent factorization and evolution. It is found that the u-quark favors a positive distribution and the d-quark favors a negative distribution, which is consistent with previous model calculations and phenomenological extractions. Based on the fit to existing world data, we also study the impact of the proposed electron-ion collider in China and conclude that it can significantly improve the precision of the worm-gear distribution function and hence enhance our understanding of nucleon spin structures.