arXiv:2412.18324·v1·High Energy Physics — Phenomenology
Global analysis of Sivers and Collins asymmetries within the TMD factorization
Chunhua Zeng🇨🇳 · Hongxin Dong🇨🇳 · Tianbo Liue · Peng Sun🇨🇳 · Yuxiang Zhao🇨🇳
Abstract
We present a global analysis of Sivers functions, transversity distribution functions, and Collins fragmentation functions within the transverse momentum dependent factorization. This analysis encompasses the latest data from semi-inclusive deep inelastic scattering, Drell-Yan, and W/Z-boson production processes as recently reported by the COMPASS and STAR Collaborations. Upon integrating the new data into our fitting, the precision of the extracted d and dbar quark Sivers and transversity distributions, as well as the tensor charge, is notably improved.