REACTIONS GAMMA-GAMMA-]K(0)(K)OVER-BAR-(0) AND GAMMA-GAMMA-]K(0)(K)OVER-BAR-(0) NEAR-THRESHOLD

被引：7
|
作者：
ACHASOV, NN
SHESTAKOV, GN
机构：
来源：
MODERN PHYSICS LETTERS A | 1994年 / 9卷 / 15期
关键词：
D O I：
10.1142/S0217732394001179
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The absence of the large Born term contribution found experimentally near the gammagamma --> K+K- reaction threshold is discussed. There are, at least, two reasons of the Born term suppression: i) the presence of a form factor and ii) the compensation of the Born term by the contributions from a0(980) and f0(975) resonances strongly coupled to the KKBAR channel. This compensation is a natural consequence of the unitarity condition. In its turn, the isotopic invariance guarantees a cancellation of the a0(980) and f0(975) contributions in gammagamma --> K0K0BAR.
引用
收藏
页码：1351 / 1360
页数：10
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