Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants

Details Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants

1996-12-02

arxiv.org/abs/nucl-th/9612007v2

Phys.Rev.C56:497-509,1997

Physics

Nuclear Physics

Nuclear Theory

Acknowledgements have been modified. 34 pages, revtex, uuencoded gz-compressed tar file

Scientific paper

10.1103/PhysRevC.56.497

Due to the internal structure of the nucleon, we should expect, in general, that the effective meson nucleon parameters may change in nuclear medium. We study such changes by using a chiral confining model of the nucleon. We use density-dependent masses for all mesons except the pion. Within a Dirac-Brueckner analysis, based on the relativistic covariant structure of the NN amplitude, we show that the effect of such a density dependence in the NN interaction on the saturation properties of nuclear matter, while not large, is quite significant. Due to the density dependence of the $g_{\sigma NN}$, as predicted by the chiral confining model, we find, in particular, a looping behavior of the binding energy at saturation as a function of the saturation density. A simple model is described, which exhibits looping and which is shown to be mainly caused by the presence of a peak in the density dependence of the medium modified $\sigma N$ coupling constant at low density. The effect of density dependence of the coupling constants and the meson masses tends to improve the results for $E/A$ and density of nuclear matter at saturation. From the present study we see that the relationship between binding energy and saturation density may not be as universal as found in nonrelativistic studies and that more model dependence is exhibited once medium modifications of the basic nuclear interactions are considered.

Affiliated with

Also associated with

No associations

Rating

Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear Matter Studies with Density-dependent Meson-Nucleon Coupling Constants will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-498573