Effects of momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei

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Using an isospin- and momentum-dependent transport model we study effects of the momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei. It is found that symmetry potentials with and without the momentum-dependence but corresponding to the same density-dependent symmetry energy $E_{sym}(ρ)$ lead to significantly different predictions on several $E_{sym}(ρ)$-sensitive experimental observables especially for energetic nucleons. The momentum- and density-dependence of the symmetry potential have to be determined simultaneously in order to extract the $E_{sym}(ρ)$ accurately. The isospin asymmetry of midrapidity nucleons at high transverse momenta is particularly sensitive to the momentum-dependence of the symmetry potential. It is thus very useful for investigating accurately the equation of state of dense neutron-rich matter.
The version to appear in Nucl. Phys. A. A paragraph and a figure on neutron and proton effective masses in neutron-rich matter are added

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Nuclear Theory, Nuclear Experiment

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http://salesiana.dossiersoluciones.com/handle/123456789/197693

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/nucl-th/0312054
 http://arxiv.org/abs/nucl-th/0312054
 Nucl.Phys.A735:563-584,2004
 doi:10.1016/j.nuclphysa.2004.02.016

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