Apr 8 – 12, 2024
Maison MINATEC, Grenoble, FRANCE
Europe/Paris timezone

Longitudinal spin transfer of semi-inclusive $\Lambda$ production in deep inelastic scattering

Apr 9, 2024, 6:20 PM
Maison MINATEC, Grenoble, FRANCE

Maison MINATEC, Grenoble, FRANCE

3 Parv. Louis Néel, 38054 Grenoble
Regular parallel talk WG5: Spin and 3D Structure WG5


Xiaoyan Zhao (Shandong University)


We study the longitudinal spin transfer of $\Lambda$-hyperon production in semi-inclusive deep inelastic scattering with both current and target fragmentation mechanisms. For existing fixed-target experiments, such as JLab, COMPASS and HERMES, the events from the current region and those from the target fragmentation region are not clearly separated. However the study of target fragmentation is relatively limited, we propose a new approach to directly compute the target fracture functions based on the spectator diquark model, which can quantify the contributions of target fragmentation well. We find that the contribution from the target fragmentation can significantly suppress the spin transfer to the $\Lambda$ in the medium-energy SIDIS process. The predictions are consistent with existing experimental data from COMPASS, HERMES, and CLAS12, and will soon be examined at high energy levels in upcoming experiments.

Primary author

Xiaoyan Zhao (Shandong University)


Prof. Tianbo Liu (Shandong University) Prof. Ya-jin Zhou (Shandong University) Prof. Zuo-tang Liang (Shandong University)

Presentation materials