Soft two-meson-exchange nucleon-nucleon potentials. II. One-pair and two-pair diagrams.

Soft two-meson-exchange nucleon-nucleon potentials. I. Planar and crossed-box diagrams.

Meson Exchange Potentials in an Nn Quark Model with Quark-antiquark Excitations

In a recent quark-model study of the NN interaction, we explicitly incorporated the qq excitations inherent in the quark-gluon interaction lagrangian into the model space, and examined the contributions to the NN potential of particular (3q)(qq) components of the single-nucleon wave function, with specific baryon and meson quantum numbers, through the Wigner transforms of the resultant coupling...

Momentum and coordinate space three-nucleon potentials.

In this paper we give explicit formulae in momentum and coordinate space for the threenucleon potentials due to ρ and π meson exchange, derived from off-mass-shell meson-nucleon scattering amplitudes which are constrained by the symmetries of QCD and by the experimental data. Those potentials have already been applied to nuclear matter calculations. Here we display additional terms which appear...

Virtual meson cloud of the nucleon and generalized parton distributions

We present the general formalism required to derive generalized parton distributions within a convolution model where the bare nucleon is dressed by its virtual meson cloud. In the one-meson approximation the Fock states of the physical nucleon are expanded in a series involving a bare nucleon and two-particle, meson-baryon, states. The baryon is assumed here to be either a nucleon or a ∆ descr...

The Two-Nucleon System beyond the Pion Threshold

A model is developed for the hadronic and electromagnetic interaction in the two-nucleon system above pion threshold in the framework of meson, nucleon and ∆ degrees of freedom. It is based on time-ordered perturbation theory and includes full meson retardation in potentials and exchange currents as well as loop contributions to the nucleonic one-body current. Results for some selected processe...