Isospin dependence of nucleon-nucleon elastic cross section

被引：53

作者：

Li, QF

Li, ZX

Mao, GJ

机构：

[1] Inst Atom Energy, Beijing 102413, Peoples R China

[2] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China

[3] Natl Lab Lanzhou, Ctr Theoret Nucl Phys, Heavy Ion Accelerator, Lanzhou 730000, Peoples R China

[4] Japan Atom Energy Res Inst, Naka, Ibaraki 3191195, Japan

来源：

PHYSICAL REVIEW C | 2000年 / 62卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.62.014606

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The in-medium neutron-proton, proton-proton (neutron-neutron) scattering cross sections (sigma(np)*, sigma(pp(nn))*) are studied based on QHD-II type Lagangian within the framework of the microscopic transport theory. The results demonstrate that, for free nucleon-nucleon scattering cross sections, the isospin dependence is dominantly caused by the rho meson field. The medium correction of nucleon-nucleon scattering cross sections is also isospin dependent, sigma(np)*, depends on the baryon density weakly and sigma(pp(nn))* depends on the baryon density significantly, which is due to the different effects of the medium correction of nucleon mass and rho meson mass on sigma(np) and sigma(pp(nn)), respectively.

引用

页数：8

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