231 citations · 2.4k across the 78 of their papers we have counts for
4 papers · 2 filters
What is the structure of the Roper resonance?
O. Krehl, C. Hanhart, S. Krewald +1
We investigate the structure of the nucleon resonance N^*(1440) (Roper) within a coupled-channel meson exchange model for pion-nucleon scattering. The coupling to pipiN states is r…
What does `rho-exchange' in piN scattering mean?
O. Krehl, C. Hanhart, S. Krewald +1
We present an alternative method for calculating amplitudes for correlated pi pi exchange in the ``sigma'' and rho channel in piN scattering. Starting from a fixed mass meson excha…
The piNN vertex function in a meson-theoretical model
R. Boeckmann, C. Hanhart, O. Krehl +2
The piNN vertex function is calculated within a dispersion theoretical approach, including both pi-rho and pi-sigma intermediate states, where the sigma meson is an abbreviation fo…
Neutron rich nuclei in density dependent relativistic Hartree-Fock theory with isovector mesons
B. Q. Chen, Z. Y. Ma, F. Gruemmer +1
Density dependent relativistic Hartree-Fock theory has been extended to describe properties of exotic nuclei. The effects of Fock exchange terms and of pi - and rho - meson contrib…