Relevance of pseudospin symmetry in proton-nucleus scattering

Details Relevance of pseudospin symmetry in proton-nucleus scattering Relevance of pseudospin symmetry in proton-nucleus scattering

2003-04-03

arxiv.org/abs/nucl-th/0304009v3

Phys.Rev. C69 (2004) 054608

Physics

Nuclear Physics

Nuclear Theory

22 pages including 9 figures, correction of 1 reference, revision of abstract and major modification of chapter 4, Fig. 6, and

Scientific paper

10.1103/PhysRevC.69.054608

The manifestation of pseudospin-symmetry in proton-nucleus scattering is discussed. Constraints on the pseudospin-symmetry violating scattering amplitude are given which require as input cross section and polarization data, but no measurements of the spin rotation function. Application of these constraints to p-58Ni and p-208Pb scattering data in the laboratory energy range of 200 MeV to 800 MeV, reveals a significant violation of the symmetry at lower energies and a weak one at higher energies. Using a schematic model within the Dirac phenomenology, the role of the Coulomb potential in proton-nucleus scattering with regard to pseudospin symmetry is studied. Our results indicate that the existence of pseudospin-symmetry in proton-nucleus scattering is questionable in the whole energy region considered and that the violation of this symmetry stems from the long range nature of the Coulomb interaction.

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