1. Orbital Angular Momentum and Shear Flow in Non-Central Heavy Ion Collisions Wei-Tian Deng

2. Geometry

3. Total Orbital Angular Momentum ? Low energy (nuclear binding energy) High energy （ RHIC ） Rotating compound nucleus Shear of the longitudinal flow Local vorticity density Quark global polarization

4. Total Orbital Angular Momentum The transverse distributions of participant nucleons

5. Total Orbital Angular Momentum Woods-Saxon nuclear distribution Hard spheres

6. Total Orbital Angular Momentum

7. Longitudinal shear flow Landau fireball model Bjorken scaling model Total angular momentum longitudinal shear flow Local relative orbital angular momentum

8. Landau fireball model the produced partons thermalize quickly have a common longitudinal flow velocity at a given transverse position

9. Landau fireball model

11. Bjorken scaling model x y z

12. HIJING Woods-Saxon nuclear density Parton level 3-dimensional expanding x z

13. Bjorken scaling model

15. Comoving frame

16. Bjorken scaling model