Self-consistent relativistic random phase approximation with vacuum polarization

Details Self-consistent relativistic random phase approximation with vacuum polarization Self-consistent relativistic random phase approximation with vacuum polarization

2005-04-16

arxiv.org/abs/nucl-th/0504052v2

Phys.Rev. C72 (2005) 034301

Physics

Nuclear Physics

Nuclear Theory

5pages, 3 figures

Scientific paper

10.1103/PhysRevC.72.034301

We present a theoretical formulation for the description of nuclear excitations within the framework of relativistic random-phase approximation whereby the vacuum polarization arising from nucleon-antinucleon fields is duly accounted for. The vacuum contribution to Lagrangian is explicitly described as extra new terms of interacting mesons by means of the derivative expansion of the effective action. It is shown that the self-consistent calculation yields zero eigenvalue for the spurious isoscalar-dipole state and also conserves the vector-current density.

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