Spin Polarizations in a Covariant Angular-Momentum-Conserved Chiral Transport Model

Liu, Shuai Y. F.; Sun, Yifeng; Ko, Che Ming

doi:10.1103/physrevlett.125.062301

Title: Spin Polarizations in a Covariant Angular-Momentum-Conserved Chiral Transport Model

Journal Article · Thu Aug 06 00:00:00 EDT 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.125.062301· OSTI ID:1802726

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Using a covariant and angular-momentum-conserved chiral transport model, which takes into account the spin-orbit interactions of chiral fermions in their scatterings via the side jumps, we study the quark spin polarization in quark matter. For a system of rotating and unpolarized massless quarks in an expanding box, we find that side jumps can dynamically polarize the quark spin and result in a final quark spin polarization consistent with that of thermally equilibrated massless quarks in a self-consistent vorticity field. Further, for the quark matter produced in noncentral relativistic heavy ion collisions, we find that in the medium rest frame both the quark local spin polarizations in the direction perpendicular to the reaction plane and along the longitudinal beam direction show an azimuthal angle dependence in the transverse plane similar to those observed in experiments for the Lambda hyperon.

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Research Organization:: Texas A & M Univ., College Station, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Welch Foundation

Grant/Contract Number:: SC0015266; A-1358

OSTI ID:: 1802726

Journal Information:: Physical Review Letters, Vol. 125, Issue 6; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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