1. Workshop on Quark-gluon Thermalization Vienna, August 10-12, 2005 In collaboration with Zuo-tang Liang Xin-Nian Wang/LBNL Thermalization and Globally Polarized QGP in Non-central Heavy-ion Collisions Instability and Cerenkov Radiation Phys. Rev. Lett. 94 (2005)102301

2. Direct Signs for Thermalization from away jets from medium decay Leading hadrons Medium Fuqiang Wang

3. Global Orbital Angular Momentum x z y Low-energy nuclear collisions: Stiff EOS P~  E Rotation and deformed nuclei x z y

4. p A  0-22-44 Global Orbital Angular Momentum x z y x z y High-energy Nuclear Collisions

5. Nuclei Are Spherical ! 3D distribution of multiplicity and Momentum Heinz & Kolb’04 Adil & Gyulassy’5

6. Transverse Gradient of Shear Velocity Distribution of number of participant projectile or target nucleons Collective longitudinal momentum per produced parton x z b

7. Local Orbital Angular Momentum (x-b/2)/R A xx

8. Quark Scattering with fixed L y Screened static potential model: xTxT p n pfpf

9. Quark Polarization Unpolarized cross section: Polarized cross section: Semi-central: b=R A xTxT p n pfpf

10. A New Picture of A+A Spin-orbital coupling xTxT p n pfpf

11. Consequences  Single-spin asymmetry: Polarized thermal dilepton, J/  Hyperons and vector mesons Directed flow? Enhanced  / ,  /p ratio

12. Constituent Quark Recombination Polarization of valence quarks + relative orbital angular momentum Polarization of constituent quarks Constituent quark model: (l=0, color anti-symmetric)

13. Features of Global Hyperon Polarization Hyperons & anti-hyperons are similarly polarized P H =0 in central and increases with b P q  0 for p T >>  p 0z, P H finite for moderate p T due to hard-soft recombination Contribution from directed flow at large y

14. Other effects P  >0 P  <0 Hadronic scattering:   

15. Thoughts for the Brave… N1N1 N2N2 N2> N1 v 2 in p+A collisions?

16. Summary Shear velocity gradient leads to global polarization if there is interaction across transverse direction due to thermalization A new picture of QGP structure in heavy- ion collisions: –Hyperon polarization, vector meson spin alignment, contribution to v2 Future work: –Quantitative evaluation of hadronic interaction –Spin transport: spintronics of strong interaction