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    High-energy behavior of the nuclear symmetry potential in asymmetric nuclear matter RID A-2398-2009

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    PhysRevC.72.064606.pdf (405.3Kb)
    Date
    2005
    Author
    Chen, LW
    Ko, Che Ming
    Li, Ba.
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    Abstract
    Using the relativistic impulse approximation with empirical NN scattering amplitude and the nuclear scalar and vector densities from the relativistic mean-field theory, we evaluate the Dirac optical potential for neutrons and protons in asymmetric nuclear matter. From the resulting Schrodinger-equivalent potential, the high-energy behavior of the nuclear symmetry potential is studied. We find that the symmetry potential at fixed baryon density is essentially constant once the nucleon kinetic energy is greater than about 500 MeV. Moreover, for such a high-energy nucleon, the symmetry potential is slightly negative below a baryon density of about rho = 0.22 fm(-3) and then increases almost linearly to positive values at high densities. Our results thus provide an important constraint on the energy and density dependence of nuclear symmetry potential in asymmetric nuclear matter.
    URI
    http://dx.doi.org/10.1103/PhysRevC.72.064606
    https://hdl.handle.net/1969.1/127000
    Description
    Journals published by the American Physical Society can be found at http://publish.aps.org/
    Subject
    HEAVY-ION COLLISIONS
    RELATIVISTIC IMPULSE APPROXIMATION
    MEAN-FIELD
    ELASTIC-SCATTERING
    EFFECTIVE-MASS
    MODEL
    EQUATION
    DEPENDENCE
    MOMENTUM
    REPRESENTATION
    Physics
    Department
    Physics and Astronomy
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    Citation
    LW Chen, Che Ming Ko and BA Li. Phys.Rev.C 72 064606 2005. "Copyright (2005) by the American Physical Society."

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