Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions
- Texas A & M Univ., College Station, TX (United States)
The longitudinal quark spin polarization along the beam direction in noncentral relativistic heavy ion collisions is studied in the chiral kinetic approach. Its azimuthal angle dependence in the transverse plane of the collision is found to have a quadrupole structure as in studies from hydrodynamic and transport models based on the relativistic spin-vorticity coupling in a thermodynamically equilibrated hadronic matter at kinetic freeze-out. The direction of the quark longitudinal spin polarization is, however, opposite to that from these models, and this is due to the axial charge current induced by the transverse component of the vorticity field in the chiral kinetic approach. Furthermore, our finding is consistent with the azimuthal angle dependence of the longitudinal spin polarization of Λ hyperons, which is mainly determined by that of the strange quark, recently measured in the experiments by the STAR Collaboration at the BNL Relativistic Heavy Ion Collider.
- Research Organization:
- Texas A & M Univ., College Station, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0015266
- OSTI ID:
- 1612272
- Alternate ID(s):
- OSTI ID: 1491607
- Journal Information:
- Physical Review C, Vol. 99, Issue 1; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Microscopic description for polarization in particle scattering
|
journal | December 2019 |
A microscopic description for polarization in particle scatterings | text | January 2019 |
Feed-down effect on $Λ$ spin polarization | text | January 2019 |
Local spin polarization in high energy heavy ion collisions | text | January 2019 |
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