A RELATIVISTIC MESON-EXCHANGE MODEL OF PION-NUCLEON SCATTERING

被引：34

作者：

HUNG, CT ^{[1
]}

YANG, SN ^{[1
]}

LEE, TSH ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 1994年 / 20卷 / 09期

关键词：

D O I：

10.1088/0954-3899/20/9/021

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：

Pion-nucleon scattering is investigated using the Kadyshevsky three-dimensional reduction of the Bethe-Salpeter equation. The resulting potential includes the direct and crossed N, Delta terms, and the t-channel sigma- and rho-exchange terms. The nucleon pole condition is imposed to define the renormalization of the nucleon mass and the pi NN coupling constant. A mixture of the scalar and vector sigma pi pi couplings is introduced to simulate the effect of the broad width of the s-wave correlated two-pion exchange mechanism. Good descriptions of the pi N phase shifts up to 400 MeV have been obtained in all S- and P-waves. The off-shell behaviours for our model differ significantly from those obtained using different reduction schemes.

引用

页码：1531 / 1536

页数：6

共 21 条

[1]

BLAMPIED G, 1993, PHYS REV LETT

[2] LINEAR INTEGRAL EQUATIONS FOR RELATIVISTIC MULTICHANNEL SCATTERING [J].