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Title: Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions

Abstract

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.

Authors:
 [1];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1612272
Alternate Identifier(s):
OSTI ID: 1491607
Grant/Contract Number:  
SC0015266
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 99; Journal Issue: 1; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics; Collective flow; Polarization phenomena; Relativistic heavy-ion collisions

Citation Formats

Sun, Yifeng, and Ko, Che Ming. Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions. United States: N. p., 2019. Web. doi:10.1103/physrevc.99.011903.
Sun, Yifeng, & Ko, Che Ming. Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions. United States. https://doi.org/10.1103/physrevc.99.011903
Sun, Yifeng, and Ko, Che Ming. 2019. "Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions". United States. https://doi.org/10.1103/physrevc.99.011903. https://www.osti.gov/servlets/purl/1612272.
@article{osti_1612272,
title = {Azimuthal angle dependence of the longitudinal spin polarization in relativistic heavy ion collisions},
author = {Sun, Yifeng and Ko, Che Ming},
abstractNote = {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.},
doi = {10.1103/physrevc.99.011903},
url = {https://www.osti.gov/biblio/1612272}, journal = {Physical Review C},
issn = {2469-9985},
number = 1,
volume = 99,
place = {United States},
year = {Tue Jan 22 00:00:00 EST 2019},
month = {Tue Jan 22 00:00:00 EST 2019}
}

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Cited by: 46 works
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Works referenced in this record:

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Works referencing / citing this record:

Microscopic description for polarization in particle scattering
journal, December 2019


Feed-down effect on $Λ$ spin polarization
text, January 2019


Local spin polarization in high energy heavy ion collisions
text, January 2019