Constraining the nuclear matter equation of state around twice saturation density

A. Le Fèvre , Y. Leifels , W. Reisdorf , Joerg Aichelin (1) , Christoph Hartnack (1)

1 SUBATECH - Laboratoire de physique subatomique et des technologies associées

Using FOPI data on elliptic flow in Au + Au collisions between 0.4 and 1.5A GeV we extract constraints for the equation of state (EOS) of compressed symmetric nuclear matter using the transport code IQMD by introducing an observable describing the evolution of the size of the elliptic flow as a function of rapidity. This observable is sensitive to the nuclear EOS and a robust tool to constrain the compressibility of nuclear matter up to 3ρ0 .

Mots clés: nuclear matter: equation of state; nucleus: equation of state; saturation: density; elliptic flow; rapidity dependence; FOPI; heavy ion: scattering; gold; energy dependence; transport theory; isospin: quantum molecular dynamics; interpretation of experiments; 0.4-1.5 GeV/nucleon; 25.75.-q; 25.75.Dw; 25.75.Ld; Heavy ions; Elliptic flow; Nuclear equation of state

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

A. Le Fèvre, Y. Leifels, W. Reisdorf, Joerg Aichelin, Christoph Hartnack. Constraining the nuclear matter equation of state around twice saturation density. Nucl.Phys.A, 2016, 945, pp.112-133. ⟨10.1016/j.nuclphysa.2015.09.015⟩. ⟨hal-01553973⟩