期刊
PHYSICS LETTERS B
卷 500, 期 1-2, 页码 37-46出版社
ELSEVIER
DOI: 10.1016/S0370-2693(01)00049-1
关键词
double-Lambda hypernucleus; twin Lambda hypemuclei; Xi(-) capture at rest; nuclear emulsion
A hybrid emulsion experiment was carried out to study double-strangeness nuclei produced via Xi (-) hyperon capture at rest with the expectation of ten times larger statistics than previous experiments. We have analyzed 5% of the total emulsion and found one twin-hypernuclei event involving the emission of two single-Lambda hypernuclei and a nuclear fragment from a Ehyperon stopping point. The event is interpreted as the decay of a Xi (-) + N-14 atomic system to He-5(Lambda) + He-5(Lambda) + He-4 + neutron. The species of the Xi (-)-atom and the fragmentation products are uniquely identified for the first time for twin-hypernuclei events. Combined with the results from a past hybrid-emulsion experiment, one double-Lambda hypernucleus and three twin-hypernuclei events have been found from Xi (-) captures on light emulsion nuclei. The ratio of the detected rate of double-Lambda hypernuclei to that of twin-hypernuclei is compared with theoretical estimates. (C) 2001 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据