Relativistic vs. Non-relativistic Nuclear Models

Details Relativistic vs. Non-relativistic Nuclear Models Relativistic vs. Non-relativistic Nuclear Models

2002-01-16

arxiv.org/abs/nucl-th/0201035v1

Physics

Nuclear Physics

Nuclear Theory

14 pages, 5 eps figures, proceedings of XIV International School on Nuclear Physics, Neutron Physics and Nuclear Energy, Septe

Scientific paper

Both the relativistic and non-relativistic model explain very well low-energy nuclear phenomena, but in a physically different way from each other. There seems to be no low-energy phenomenon to answer which model is more reasonable. In order to explore a difference between two models, high momentum transfer phenomena are investigated. First it is shown that the neutron spin-orbit charge density in the relativistic model reproduces very well experimental data on elastic electron scattering which have not been explained in the non-relativistic model. Next it is predicted that the relativistic Coulomb sum value is strongly quenched, compared with the non-relativistic one. This quenching is owing to the anti-nucleon degrees of freedom, which make the nucleon size larger and equivalently the vector-meson mass smaller in nuclear medium. New experiment on the Coulomb sum values around the momentum transfer 1GeV is expected to distinguish the relativistic from the non-relativistic model.

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