Differential flow in heavy-ion collisions at balance energies

A strong differential transverse collective flow is predicted for the first time to occur in heavy-ion collisions at balance energies. We also give a novel explanation for the disappearance of the total transverse collective How at the balance energies. it is further shown that the differential How especially at high transverse momenta is a useful microscope capable of res olving the balance energy's dual sensitivity to both the nuclear equation o f state and in-medium nucleon-nucleon cross sections in the reaction dynami cs.