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Three-Body ΛNN → nNN Nonmesonic Weak Decay Process of Λ Hypernuclei
被引：0
作者：
H. Bhang
S. Ajimura
K. Aoki
A. Banu
T. Fukuda
O. Hashimoto
J. I. Hwang
S. Kameoka
B. H. Kang
E. Kim
J. H. Kim
M. Kim
T. Maruta
Y. Miura
Y. Miyake
T. Nagae
M. Nakamura
S. N. Nakamura
H. Noumi
S. Okada
Y. Okayasu
H. Outa
H. Park
P. K. Saha
Y. Sato
M. Sekimoto
T. Takahashi
H. Tamura
K. Tanida
A. Toyoda
K. Tshoo
K. Tsukada
T. Watanabe
H. J. Yim
机构：
[1] Seoul National University,Department of Physics and Astronomy
[2] Osaka University,Department of Physics
[3] High Energy Accelerator Research Organization (KEK),Laboratory of Physics
[4] Gesellschaft fur Schwerionenforschung mbH (GSI),Department of Physics
[5] Osaka Electro Communication University,Department of Physics
[6] Tohoku University,Department of Physics
[7] Ewha Womans University,Department of Physics
[8] Korea Research Institute of Standards and Science (KRISS),Department of Physics
[9] University of Tokyo,Department of Nuclear Engineering
[10] Tokyo Institute of Technology,undefined
[11] Riken Nishina Center,undefined
[12] Kyoto University,undefined
[13] Japan Atomic Energy Research Institute,undefined
[14] INFN-LNF,undefined
[15] Hanyang University,undefined
来源：
Few-Body Systems
|
2013年
/
54卷
关键词：
Weak Decay;
Coincidence Measurement;
Nucleon Pair;
Proton Energy Spectrum;
Nucleon Spectrum;
D O I：
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中图分类号：
学科分类号：
摘要：
The fundamental motivation to study the non-mesonic weak decay (NMWD) of Λ hypernuclei is that it provides the unique channel for the information of the baryon–baryon weak interaction in SU3f group. The relative strength of the two main channels of NMWD whose decay processes are the Λp → np and Λn → nn has been the long standing puzzle during last several decades. The puzzling status has been settled down recently with the Γn / Γp value converging to \documentclass[12pt]{minimal}
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\begin{document}$${\sim 0.5}$$\end{document} . The large experimental values of Γn / Γp of the previous measurements turned out to be due to the surprisingly large contribution of the competing three-body NMWD, ΛNN → nNN process. This paper discusses about the first measurement of the branching ratio of the three-body NMWD process and the renormalized intra-nuclear cascade method adopted to disentangle the contribution of the three-body process out of those due to final state interaction. And the prospects of the more accurate measurement of the three-body process also are presented.
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页码：103 / 110
页数：7
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