Elliptic flow in heavy ion collisions near the balance energy

Details Elliptic flow in heavy ion collisions near the balance energy Elliptic flow in heavy ion collisions near the balance energy

1999-06-24

arxiv.org/abs/nucl-th/9906076v1

Phys.Rev.Lett. 83 (1999) 2534-2536

Physics

Nuclear Physics

Nuclear Theory

6 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.83.2534

The proton elliptic flow in collisions of Ca on Ca at energies from 30 to 100 MeV/nucleon is studied in an isospin-dependent transport model. With increasing incident energy, the elliptic flow shows a transition from positive to negative flow. Its magnitude depends on both the nuclear equation of state (EOS) and the nucleon-nucleon scattering cross section. Different elliptic flows are obtained for a stiff EOS with free nucleon-nucleon cross sections and a soft EOS with reduced nucleon-nucleon cross sections, although both lead to vanishing in-plane transverse flow at the same balance energy. The study of both in-plane and elliptic flows at intermediate energies thus provides a means to extract simultaneously the information on the nuclear equation of state and the nucleon-nucleon scattering cross section in medium.

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