The ΛΛ→YN weak transition in double-Λ hypernuclei

被引：8
|
作者：
Sasaki, K
Inoue, T
Oka, M
机构：
[1] KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan
[2] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
[3] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
来源：
NUCLEAR PHYSICS A | 2003年 / 726卷 / 3-4期
关键词：
hypernuclei; nonmesonic decay; direct quark process;
D O I：
10.1016/j.nuclphysa.2003.07.008
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We calculate the LambdaLambda --> YN transition rate of He-0(LambdaLambda) by the hybrid picture, the pi and K exchanges plus the direct quark processes. It is found that the hyperon-induced decay is weaker than the nucleon-induced decay, but the former may reveal the short-range mechanism of the weak transition and also give a clear signal of the strong DeltaI = 3/2 transition. The LambdaLambda --> YN transition in double-Lambda hypernucleus is complement to the LambdaN --> NN transition as it occurs only in the J = 0 channel, while the J = 1 transition is dominant in the LambdaN --> NN case. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：349 / 355
页数：7
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