Globally Polarized Quark-gluon Plasma in Non-central A+A Collisions

Details Globally Polarized Quark-gluon Plasma in Non-central A+A Collisions Globally Polarized Quark-gluon Plasma in Non-central A+A Collisions

2004-10-18

arxiv.org/abs/nucl-th/0410079v5

Phys.Rev.Lett.94:102301,2005; Erratum-ibid.Lett.96:039901,2006

Physics

Nuclear Physics

Nuclear Theory

4 pages in RevTex with 2 postscript figures, an erratum is added to the final published version

Scientific paper

10.1103/PhysRevLett.94.102301

Produced partons have large local relative orbital angular momentum along the direction opposite to the reaction plane in the early stage of non-central heavy-ion collisions. Parton scattering is shown to polarize quarks along the same direction due to spin-orbital coupling. Such global quark polarization will lead to many observable consequences, such as left-right asymmetry of hadron spectra, global transverse polarization of thermal photons, dileptons and hadrons. Hadrons from the decay of polarized resonances will have azimuthal asymmetry similar to the elliptic flow. Global hyperon polarization is predicted within different hadronization scenarios and can be easily tested.

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