Speaker
Wen-Hao Yao
(Shandong University)
Description
Spin-dependent fragmentation functions encode essential information on the spin transfer from partons to hadrons and are typically studied in experiments with polarized beams. In particular, the longitudinal spin transfer $G_{1L}$ remains poorly constrained. In $Z^0/W^\pm$-tagged jet production, the parity violation of weak interaction induces a longitudinal polarization of the jet. This polarization allows $G_{1L}$ to be investigated in unpolarized $pp$ and $AA$ collisions. Our results indicate that the $\Lambda$ hyperon polarization is sensitive to $G_{1L}$ and can be used to constrain this fragmentation function.
Reference: W. H. Yao, X. Li, H. Dong and S. Y. Wei, arXiv:2511.06705 [hep-ph]
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Authors
Wen-Hao Yao
(Shandong University)
Xiaowen Li
(Shandong University)
Hui Dong
(Shandong University)
Shu-Yi Wei
(Shandong University)