Local and global Λ polarization in a vortical fluid
- We compute the fermion spin distribution in the vortical fluid created in off-central high energy heavy-ion collisions. We employ the event-by-event (3+1)D viscous hydrodynamic model. The spin polarization density is proportional to the local fluid vorticity in quantum kinetic theory. As a result of strong collectivity, the spatial distribution of the local vorticity on the freeze-out hyper-surface strongly correlates to the rapidity and azimuthal angle distribution of fermion spins. We investigate the sensitivity of the local polarization to the initial fluid velocity in the hydrodynamic model and compute the global polarization of Λ hyperons by the AMPT model. The energy dependence of the global polarization agrees with the STAR data.
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| Author: | Hui LiORCiD, Hannah PetersenORCiDGND, Long-Gang PangORCiD, Qun WangORCiD, Xiao-Liang XiaORCiD, Xin-Nian WangORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-773606 |
| DOI: | https://doi.org/10.1016/j.nuclphysa.2017.04.008 |
| ISSN: | 0375-9474 |
| Parent Title (English): | Nuclear Physics A |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2017/09/25 |
| Date of first Publication: | 2017/09/25 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Contributing Corporation: | International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (26. : 2017 : Chicago, Ill.) |
| Release Date: | 2023/10/19 |
| Tag: | Polarization; Spin distribution and correlation; Vorticity |
| Volume: | 967 |
| Page Number: | 4 |
| First Page: | 772 |
| Last Page: | 775 |
| HeBIS-PPN: | 517297566 |
| Institutes: | Physik |
| Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
