Baryons 2025 - International Conference on the Structure of Baryons

Spin polarization from hadrons to (anti-)(hyper-)nuclei in heavy-ion collisions

13 Nov 2025, 14:40

15m

2F Room 201B (ICC Jeju)

Contributed Talk 5. Hadrons from heavy-ion collisions Parallel Session C

Speakers

Dr KaiJia Sun (Institute of Modern Physics, Fudan University, Shanghai, China)Dr KaiJia Sun (Institute of Modern Physics, Fudan University, Shanghai, China)

Description

Particles of non-zero spin produced in non-central heavy-ion collisions are expected to be polarized along the direction perpendicular to the reaction plane because of their spin-orbit interactions in the produced matter. In this talk, I will show that the hypertriton, which is the lightest hypernucleus, is also polarized in these collisions. I will demonstrate that the polarization and decay pattern of hypertriton provides a unique tool to decipher the spin structure of hypertriton wavefunction. I will further discuss the possibility of studying the spin correlations among nucleons and Λ hyperons in the produced hadronic matter from the measured Λ polarization in non-central heavy-ion collisions.

Reference: Kai-Jia Sun et al., Phys. Rev. Lett.134.022301 (2025)

Presentation materials

HypernucleiPolarization-kjsun-FDU.pdf