Pion contribution to K+-nucleus scattering from chiral Lagrangian

被引：0

作者：

Tan, YH

Li, L

Ning, PZ

机构：

[1] CCAST, World Lab, Beijing 100080, Peoples R China

[2] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

[3] Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

EUROPHYSICS LETTERS | 2002年 / 58卷 / 02期

关键词：

D O I：

10.1209/epl/i2002-00389-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The K+ interactions with the on-and off-mass-shell virtual pions in nuclei are evaluated in the chiral perturbation theory at the leading order. It is found that the contribution of the nuclear pions to the ratio of the cross-sections R = sigma ( K(+)A) /6sigma ( K+ D) for nuclei C-12 and Si-28 is about 9%. Inclusion of the off-mass-shell behavior of the K+ pi amplitude may produce a significant improvement to the systematic discrepancies between the experiment data and optical model calculations on the ratio R.

引用

页码：202 / 208

页数：7

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