Exchange Current Due to Rho-Meson Exchange

Meson exchange models for Meson production

The production of mesons in nucleon–nucleon collisions is reviewed from the viewpoint of the meson–exchange picture. In the first part various possible production mechanisms and their relative importance are discussed. In addition, general features of meson production are described. In the second part special emphasis is put on pion production. Implications of chiral perturbation theory are dis...

Relativistic Effects in Electromagnetic Meson–Exchange Currents

Following recent studies of non–relativistic reductions of the single–nucleon electromagnetic current operator, here we extend the treatment to include meson exchange current operators. In contrast to the traditional scheme where approximations are made for the transferred momentum, transferred energy and momenta of the initial–state struck nucleons, we treat the problem exactly for the transfe...

Scalar meson exchange and the baryon spectra

We explore the role of a scalar meson exchange interaction between quarks in a semirelativistic constituent quark model where the quarks are also subject to a linear confinement. We search for a variational solution and study how the spectrum evolves when the strength of the scalar meson exchange increases. Our results have good implications on the description of the low-lying baryon masses, es...

Scalar and vector meson exchange in

Meson Exchange Effect on Color Superconductivity

We investigate the effects of pion and gluon exchanges on the formation of two-flavor color superconductivity at moderate density, μ < 1GeV . The chiral quark model proposed by Manohar and Georgi containing pions as well as gluons is employed to show that the pion exchange reduces substantially the value of the superconducting gap gotten with the gluon exchange only. It turns out that the pion ...