TY  - JOUR
A1  - Weickgenannt, Nora
A1  - Speranza, Enrico
A1  - Sheng, Xin-li
A1  - Wang, Qun
A1  - Rischke, Dirk H.
T1  - Generating spin polarization from vorticity through nonlocal collisions
T2  - Physical review letters
N2  - We derive the collision term in the Boltzmann equation using the equation of motion for the Wigner function of massive spin-1/2 particles. To next-to-lowest order in h, it contains a nonlocal contribution, which is responsible for the conversion of orbital into spin angular momentum. In a proper choice of pseudogauge, the antisymmetric part of the energy-momentum tensor arises solely from this nonlocal contribution. We show that the collision term vanishes in global equilibrium and that the spin potential is, then, equal to the thermal vorticity. In the nonrelativistic limit, the equations of motion for the energy-momentum and spin tensors reduce to the well-known form for hydrodynamics for micropolar fluids.
KW  - Hydrodynamic models
KW  - Quantum field theory
KW  - Quark-gluon plasma
KW  - Relativistic heavy-ion collisions
KW  - Relativistic kinetic theory
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62955
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-629555
SN  - 1079-7114
N1  - Funded by SCOAP. The work of D. H. R., E. S., and N. W. is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the Collaborative Research Center CRC-TR 211 “Strong-interaction matter under extreme conditions” Project No. 315477589—TRR 211. E. S. acknowledges support by BMBF “Forschungsprojekt: 05P2018—Ausbau von ALICE am LHC (Grant No. 05P18RFCA1)”. X.-L. S. and Q. W. are supported in part by the National Natural Science Foundation of China (NSFC) under Grants No. 11890713, No. 11890710, and No. 11947301.
VL  - 127.2021
IS  - 5, art. 2301
SP  - 1
EP  - 7
PB  - APS
CY  - College Park, Md.
ER  -