Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-12-22
Phys.Rev. C69 (2004) 017601
Physics
Nuclear Physics
Nuclear Theory
11 pages,4 figures, 1 table. accepted by PRC
Scientific paper
10.1103/PhysRevC.69.017601
The in-medium neutron-proton, proton-proton (neutron-neutron) elastic scattering cross sections ($\sigma_{np}^{*}$, $\sigma_{pp(nn)}^{*}$) are studied based on the effective Lagrangian of density dependent relativistic hadron theory in which the $\delta$[$a_0(980)$] meson is included. Our study shows that at low densities the $\sigma_{np}^*$ is about 3-4 times larger than $\sigma_{pp(nn)}^*$ and at densities higher than the normal density the isospin effect is almost washed out. Because of coupling to $\delta$ meson the $\sigma_{nn}^*$ and $\sigma_{pp}^*$ are different in isospin asymmetric medium following the splitting of the proton and neutron mass. The isospin effect on the density dependence of the in-medium nucleon elastic cross section is dominantly contributed by the isovector $\delta$ and $\rho$ mesons. The temperature effect on the $\sigma_{np}^*$ and $\sigma_{pp(nn)}^*$ is studied. It is shown that the temperature effect is weaker compared with the density effect but it becomes obvious as density increases.
Li Qingfeng
Li Zhuxia
Zhao Enguang
No associations
LandOfFree
Density and temperature dependence of nucleon-nucleon elastic cross section 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 Density and temperature dependence of nucleon-nucleon elastic cross section, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Density and temperature dependence of nucleon-nucleon elastic cross section will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-618709