3 papers
hep-ph1996
RPA-Approach to the Excitations of the Nucleon, Part II: Phenomenology
S. Hardt, J. Geiss, H. Lenske +1
The tensor-RPA approach developed previously in part I is applied to the Nambu-Jona-Lasinio (NJL) model. As a first step we investigate the structure of Dirac-Hartree-Fock solution…
hep-ph1996
RPA-Approach to the Excitations of the Nucleon, Part I: Theory
S. Hardt, J. Geiss, H. Lenske +1
In this paper we develop a theoretical framework which allows us to study excitations of the nucleon. Assuming an effective two-body interaction as a model for low-energy QCD, we d…
nucl-th1995
RPA Description of the Electric Polarizability of the Nucleon
J. Geiss, S. Hardt, H. Lenske +1
Excited states of the nucleon are described as RPA configurations on a mean--field ground state taken from the MIT bag model. A residual interaction of a structure as in the Nambu-…