TY  - JOUR
A1  - Becattini, Francesco
A1  - Florkowski, Wojciech
A1  - Speranza, Enrico
T1  - Spin tensor and its role in non-equilibrium thermodynamics
T2  - Physics Letters B
N2  - It is shown that the description of a relativistic fluid at local thermodynamic equilibrium depends on the particular quantum stress-energy tensor operator chosen, e.g., the canonical or symmetrized Belinfante stress-energy tensor. We argue that the Belinfante tensor is not appropriate to describe a relativistic fluid whose macroscopic polarization relaxes slowly to thermodynamic equilibrium and that a spin tensor, like the canonical spin tensor, is required. As a consequence, the description of a polarized relativistic fluid involves an extension of relativistic hydrodynamics including a new antisymmetric rank-two tensor as a dynamical field. We show that the canonical and Belinfante tensors lead to different predictions for measurable quantities such as spectrum and polarization of particles produced in relativistic heavy-ion collisions.
Y1  - 2018
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/54670
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-546700
SN  - 1873-2445
SN  - 0370-2693
VL  - 789.2019
SP  - 419
EP  - 425
PB  - Elsevier
CY  - Amsterdam [u.a.]
ER  -