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题名: Density and temperature dependence of nucleon-nucleon elastic cross section
作者: Li, QF ;  Li, ZX ;  Zhao, EG
刊名: PHYSICAL REVIEW C
出版日期: 2004
卷号: 69, 期号:1, 页码:-
关键词: RELATIVISTIC MEAN-FIELD ;  MICROSCOPIC CALCULATION ;  FRAGMENTATION ;  ISOTOPES ;  ISOSPIN ;  MATTER ;  SCALAR ;  MESON
学科分类: Physics
通讯作者: Li, QF , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; China Inst Atom Energy, Beijing 102413, Peoples R China; Natl Lab Lanzhou Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
英文摘要: 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 three to four 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 masses. 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000188747700057
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14150
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, QF,Li, ZX,Zhao, EG. Density and temperature dependence of nucleon-nucleon elastic cross section[J]. PHYSICAL REVIEW C,2004,69(1):-.
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