  Helicity separation effect in non-central heavy ion collisions is
investigated using the Hadron-String Dynamics (HSD) model. Computer simulations
are done to calculate velocity and hydrodynamic helicity on a mesh in a small
volume around the center of the reaction. The time dependence of hydrodynamic
helicity is observed for various impact parameters and different calculation
methods. Comparison with a similar earlier work is carried out. A new quantity
is used to ananlyze particles in the final state. It is used to probe for p-odd
effects in the final state.
