Isoscalar giant quadrupole resonance state in a relativistic approach with the momentum-dependent self-energies

Tomoyuki Maruyama, Satoshi Chiba
2000 Physical Review C  
We study the excited energy of the isoscalar giant quadrupole resonance with the scaling method in the relativistic many-body framework. In this calculation we introduce the momentum-dependent parts of the Dirac self-energies arising from the one-pion exchange on the assumption of the pseudo-vector coupling with nucleon field. It is shown that this momentum-dependence enhances the Landau mass significantly and thus suppresses the quadrupole resonance energy even giving the small Dirac effective
more » ... all Dirac effective mass which causes a problem in the momentum-independent mean-field theory.
doi:10.1103/physrevc.61.037301 fatcat:64abrdastbdjfd27jlspuuffpi