K-]PI-PI-PI-DECAYS IN LARGE NC CHIRAL PERTURBATION-THEORY

被引：16

作者：

CHENG, HY ^{[1
]}

机构：

[1] ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN

来源：

PHYSICS LETTERS B | 1990年 / 238卷 / 2-4期

关键词：

D O I：

10.1016/0370-2693(90)91755-Z

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Corrections to the current-algebra analysis of ΔI = 1 2 and 3 2K → πππ decay amplitudes including Ks→ π+π-π0 are calculated using the large Nc higher-order effective chiral lagrangians for strong and weak interactions. Neglecting gluonic corrections to the coupling constants of the higher-derivative chiral lagrangians, we find an agreement between theory and experiment within 30% for the constant and linear terms of ΔI = 1 2 transitions. Quadratic coefficients of various ΔI = 3 2 amplitudes in the Dalitz plot are predicted. The branching ratio and the slope parameter of Ks → π+π-π0 are found to be 3.9 × 10-7 and 4.4 × 10-2, respectively. © 1990.

引用

页码：399 / 405

页数：7

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