GAMMA-GAMMA-]PI-0-PI-0 AND KL-]PI-0-GAMMA-GAMMA IN THE CHIRAL QUARK-MODEL

被引：33

作者：

BIJNENS, J ^{[1
]}

DAWSON, S ^{[1
]}

VALENCIA, G ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.44.3555

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the process gamma-gamma --> pi-0-pi-0 within the quark model. We find small corrections to the lowest-order result obtained from chiral loops. These corrections are very similar to those found in vector-meson-dominated models, and too small to be tested with the present data. We use this result, together with a simple pole model, to find the amplitude for K(L) --> pi-0-gamma-gamma and use this to estimate the CP-conserving part of K(L) --> pi-0e+e-. For this last process we find a branching ratio approximately 2.3 X 10(-13), significantly smaller than the CP-violating contribution.

引用

页码：3555 / 3561

页数：7

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