Baryon flow at SIS energies

Abstract

We calculate the baryon flow $<P_x/A(y)>$ in the energy range from .25 to $\le 2.5AGeV$ in a relativistic transport model for $Ni+Ni$ and $Au+Au$ collisions employing various models for the baryon self energies. We find that to describe the flow data of the FOPI Collaboration the strength of the vector potential has to be reduced at high relative momentum or at high density such that the Schrödinger- equivalent potential at normal nuclear density decreases above 1 GeV relative kinetic energy and approaches zero above 2 GeV.

20 pages, LATEX, 7 PostScript figures

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