LOW-ENERGY PION-NUCLEON P-WAVE SCATTERING IN THE SKYRME MODEL

被引：26

作者：

HOLZWARTH, G ^{[1
]}

PARI, G ^{[1
]}

JENNINGS, BK ^{[1
]}

机构：

[1] TRIUMF,VANCOUVER V6T 2A3,BC,CANADA

来源：

NUCLEAR PHYSICS A | 1990年 / 515卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0375-9474(90)90278-T

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 πN P-wave scattering amplitudes are calculated in the Skyrme model for pion momenta up to k=3mπ. From the contributions of the rotational zero modes to the background scattering the πNN form factor is extracted. Linear and quadratic time-derivative interactions are added to the K-matrix in plane-wave Born approximation. Best results are obtained with the physical value fπ=93 MeV and they reproduce the essential features of the P-wave data analysis. Deficiencies are due to two shortcomings of the Skyrme stabilization mechanism: the pion-nucleon coupling constant is too small by a factor of ∼0.77 and the Skyrmion is too soft for monopole vibrations. © 1990.

引用

页码：665 / 685

页数：21

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