Author/Authors :
Trautmann، نويسنده , , W. and Chartier، نويسنده , , M. and Leifels، نويسنده , , Y. and Lemmon، نويسنده , , R.C. and Li، نويسنده , , Q. and ?ukasik، نويسنده , , J. J. Pagano، نويسنده , , Mark A. and Pawlowski، نويسنده , , P. and Russotto، نويسنده , , P. and Wu، نويسنده , , P.، نويسنده ,
Abstract :
The elliptic flow (squeeze-out) of neutrons, protons and light complex particles in reactions of neutron-rich systems at relativistic energies is proposed as an observable, sensitive to the strength of the symmetry term in the equation of state at supra-normal densities. Preliminary results from a study of the existing FOPI/LAND data for 197Au + 197Au collisions at 400 A MeV with the UrQMD model favor a moderately soft symmetry term with a density dependence of the potential term proportional to ( ρ / ρ 0 ) γ with γ = 0.6 ± 0.3 .
Keywords :
UrQMD model , Nuclear equation of state , Symmetry energy , Elliptic flow
