28 research outputs found
Hyperons in nuclear matter
The chiral version of the QMC model, in which the effect of gluon and pion
exchanges is included self-consistently, is applied to the hyperons in a
nuclear medium. The hyperfine interaction due to the gluon exchange plays an
important role in the in-medium baryon spectra, while the pion-cloud effect is
relatively small. At the quark mean-field level, the feels more
attractive force than the \Sigma or \Xi in matter.Comment: 9 pages, 6 figure
Quark-meson coupling model with the cloudy bag
Using the volume coupling version of the cloudy bag model, the quark-meson
coupling model is extended to study the role of pion field and the properties
of nuclear matter. The extended model includes the effect of gluon exchange as
well as the pion-cloud effect, and provides a good description of the nuclear
matter properties. The relationship between the extended model and the EFT
approach to nuclear matter is also discussed.Comment: 13 pages, 3 figure