How Deep is the Antinucleon Optical Potential at FAIR energies

Details How Deep is the Antinucleon Optical Potential at FAIR energies How Deep is the Antinucleon Optical Potential at FAIR energies

2011-05-23

arxiv.org/abs/1105.4450v2

Phys.Lett.B703:193-198,2011

Physics

Nuclear Physics

Nuclear Theory

13 pages, 5 figures, accepted version to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2011.07.071

The key question in the interaction of antinucleons in the nuclear medium concerns the deepness of the antinucleon-nucleus optical potential. In this work we study this task in the framework of the non-linear derivative (NLD) model which describes consistently bulk properties of nuclear matter and Dirac phenomenology of nucleon-nucleus interactions. We apply the NLD model to antinucleon interactions in nuclear matter and find a strong decrease of the vector and scalar self-energies in energy and density and thus a strong suppression of the optical potential at zero momentum and, in particular, at FAIR energies. This is in agreement with available empirical information and, therefore, resolves the issue concerning the incompatibility of G-parity arguments in relativistic mean-field (RMF) models. We conclude the relevance of our results for the future activities at FAIR.

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