INCLUSION OF PI-NN VERTEX INTO DELTA-ISOBAR DYNAMICS

被引：10
|
作者：
BULLA, A [1 ]
SAUER, PU [1 ]
机构：
[1] UNIV WASHINGTON,DEPT PHYS,NUCL THEORY GRP,SEATTLE,WA 98195
来源：
FEW-BODY SYSTEMS | 1992年 / 12卷 / 2-4期
关键词：
D O I：
10.1007/BF01074813
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A force model is discussed for the description of the two-nucleon system below and above pion threshold and its coupled inelastic channels with one pion. It uses DELTA-isobar and pion degrees of freedom in addition to the nucleonic ones. It is constructed to be valid up to 500 MeV centre-of-mass energy. The characteristic of the force model is its mechanism for pion production and pion absorption which is mediated simultaneously by the DELTA-isobar and through the pion-nucleon-nucleon vertex. The physical nucleon becomes a composite system consisting of a bare nucleon and of pion-nucleon configurations. The required scattering theory for coupled two- and three-particle systems is presented. The force model is applied to elastic and inelastic two-nucleon scattering in isospin triplet and isospin singlet partial waves.
引用
收藏
页码：141 / 174
页数：34
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