Apr 4 – 10, 2022
Auditorium Maximum UJ
Europe/Warsaw timezone

Spin-thermal shear coupling in relativistic nuclear collisions

Apr 5, 2022, 6:10 PM
small aula (Auditorium Maximum UJ)

small aula

Auditorium Maximum UJ

Oral presentation Chirality, vorticity and spin polarization Parallel Session T02: Chirality, vorticity and spin polarization


Matteo Buzzegoli


The measurements of spin polarization of particles emitted in heavy-ion collisions has opened the possibility for new phenomenological investigations of spin physics in relativistic fluids. The theoretical predictions of global polarization are in agreement with the data, but consistent discrepancies stand out for the local polarization. In this talk, I will show that the covariant theory of quantum relativistic fluids at local equilibrium implies an additional, non-dissipative, contribution to the spin polarization vector which is proportional to the thermal shear which has been previously overlooked. This additional contribution together with an improved approximation in the expansion of the density operator at local equilibrium is able to restore the quantitative agreement between the theoretical predictions and the experimental data.
[F. Becattini, M. Buzzegoli and A. Palermo, Phys.Lett.B 820 (2021) 136519]
[F. Becattini, M. Buzzegoli, A. Palermo, G. Inghirami and I. Karpenko, arXiv:2103.14621]

Primary authors

Andrea Palermo (University of Florence and INFN florence) Matteo Buzzegoli Francesco Becattini (Unversity of Florence) Gabriele Inghirami (GSI, Darmstadt) Iurii Karpenko (FNSPE CTU in Prague) Matteo Buzzegoli (INFN)

Presentation materials