Kaon-baryon coupling constants from QCD sum rules analysis

被引：5
|
作者：
Krippa, B
机构：
[1] Institute for Nuclear Research, Russian Academy of Sciences
来源：
PHYSICS LETTERS B | 1998年 / 420卷 / 1-2期
关键词：
D O I：
10.1016/S0370-2693(97)01454-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the KN Sigma and KN Lambda coupling constants using QCD sum rules. We consider the correlators of two interpolating baryon fields taken with kaon in initial state. The parts of the correlators with Dirac structure K gamma(5) are used, keeping all terms up to dimension 5 in the OPE and including continuum contributions on the phenomenological side. The ratios of these sum rules to baryon mass sum rules yield stable results with values for the couplings of g(KN Sigma) similar or equal to 3.6 +/- 2 and g(KN Lambda) similar or equal to 10 +/- 6. The sources of uncertainty are discussed. (C) 1998 Published by Elsevier Science B.V.
引用
收藏
页码：13 / 19
页数：7
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