Speaker
Description
We have implemented the 3+1 dimensional CLVisc hydrodynamics model with TRENTO-3D initial conditions to investigate the spin polarization of Lambda hyperons along the beam direction in p+Pb collisions at
sNN= 8.16 TeV. Following our previous theoretical framework based on quantum kinetic theory, we consider three different scenarios: Lambda equilibrium, s quark equilibrium, and iso-thermal equilibrium scenarios. We have computed the second Fourier sine coefficients of spin polarization along the beam direction, Additionally, we have also computed the spin polarization along the beam direction. We find that the spin polarization induced by thermal vorticity always provides an opposite contribution compared to the shear-induced polarization in p+Pb collisions. The total spin polarization computed by the current hydrodynamic model disagrees with the data measured by LHC-CMS experiments. Our findings imply that other non-flow effects may play a crucial role in p+Pb collisions.
