  The double differential multiplicities and rapidity distributions for Lambda
hyperon production in central Au+Au interactions at AGS in the range of
rapidities from 1.7 to 3.2 and the range of transverse kinetic energies from
0.0 to 0.7 GeV are parametrized in terms of the the Blast Wave approximation.
The longitudinal and transverse radial expansion parameters and the mean
temperature of Lambda hyperons after the freeze-out of the nuclear matter are
presented. The predictions of the RQMD model with and without mean field
potentials are compared to our data. Both variants of RQMD are parameterized in
terms of the Blast Wave model and the results of such parameterizations are
compared to the experimental ones. It is found that inclusion of the mean field
potentials in RQMD is essential to account for the strong expansion observed in
the data.
