The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Quantum kinetic theory from QED and spin polarization in heavy ion collisions

Not scheduled

20m

Copenhagen

Poster New theoretical techniques at large and small coupling

Speaker

Shu Lin

Description

The global spin polarization of Lambda hyperon in heavy ion collisions has been well described by spin-vorticity coupling, serving as an evidence for creation of rapid spinning quark-gluon plasma. However the same picture fails to explain the measurement of local spin polarization. Existing kinetic transport theories based on Boltzmann equation cannot describe spin degree of freedoms, calling for a generalized to quantum kinetic theory. To this end, we derived a quantum kientic theory from quantum electrodynamics as a prototype to quantum chromodynamics [1], which consistently incorporates collisional effect. We presented a more complete result on spin polarization based on the quantum kinetic theory, indicating enhancement of spin-shear coupling [2].

[1]Shu Lin, Phys.Rev.D 105 (2022) 7, 076017
[2]Shu Lin and Ziyue Wang, JHEP 12 (2022) 030