Speaker
Description
Spin polarization, as a novel method for detecting the rotational properties of QGP which are produced in relativistic heavy-ion collisions, has attractd great interest. We study the impact of parton spin polarization on the effective transport and thermodynamic coefficients and the QCD critical point in non central light- and heavy-ion collisions. By employing the novel kinetic theory method, we found that the transport and thermodynamic coefficients, i.g, speed of sound squared $c_{s}^{2}$, specific shear viscosity $\eta/s$, specific bulk viscosity $\zeta/s$, and mean of free path $\lambda$, are significantly affected by spin polarization. The spin polarization impact on $\eta/s$ and $\lambda$ show that monotonic dependent on collision energy in terms of both the radius and temperature. While the spin polarization impact on $c_{s}^{2}$ and $\zeta/s$ exhibit that non-monotonic dependent on collision energy in terms of both the radius and temperature. The non-monotonic behavior suggests that spin polarization can serve as an effective probe for the critical point of the QCD phase transition.
References
[1] De-Xian Wei, Wei-Tian Deng, and Xu-Guang Huang. Thermal vorticity and spin polarization in heavy-ion collisions. Phys. Rev. C 99, 014905 (2019).
[2] De-Xian Wei. Spin polarization as a probe of QCD critical point. Submitted to Phys. Rev. Lett. (2025).
[3] De-Xian Wei. Spin polarization impact on QCD critical point. Submitted to Phys. Lett. B (2025).
