Dear All,
 
We have the pleasure of inviting you to the Particle Theory Seminar on Tuesday, May 7 at 12:15, which will be given by

Soham Banerjee (NICER)

entitled

„Longitudinal spin polarization in a thermal model with dissipative corrections".

Abstract:

In this work we address the problem of longitudinal spin polarization of the Lambda hyperons produced in relativistic heavy-ion collisions. We combine a relativistic kinetic-theory framework that includes spin degrees of freedom treated in a classical way with the freeze-out parametrization used in previous investigations. The use of the kinetic theory allows us to incorporate dissipative corrections (due to the thermal shear and gradients of thermal vorticity) into the Pauli-Lubanski vector that determines spin polarization and can be directly compared with the experimental data. As in earlier similar studies, it turns out that a successful description of data can only be achieved with additional assumptions -- in our case they involve the use of projected thermal vorticity and a suitably adjusted time for spin relaxation. The latter turns out to be of about 2--3 fm/c which is compatible with other estimates.

The speaker will be on-site, local participants are invited to meet in the seminar room D-2-02.