Observation of a He-6(Lambda Lambda) double hypernucleus - art. no. 212502

Citation
H. Takahashi et al., Observation of a He-6(Lambda Lambda) double hypernucleus - art. no. 212502, PHYS REV L, 8721(21), 2001, pp. 2502
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
8721
Issue
21
Year of publication
2001
Database
ISI
SICI code
0031-9007(20011119)8721:21<2502:OOAHLD>2.0.ZU;2-9
Abstract
A double-hyperfragment event has been found in a hybrid-emulsion experiment . It is identified uniquely as the sequential decay of He-6(Lambda Lambda) emitted from a Xi (-) hyperon nuclear capture at rest. ne mass of He-6(Lamb da Lambda) and the Lambda-Lambda interaction energy DeltaB(Lambda Lambda) h ave been measured for the first time devoid of the ambiguities due to the p ossibilities of excited states. The value of DeltaB(Lambda Lambda) is 1-01 0.20(-0.11)(+0.18) mev. This demonstrates that the Lambda-Lambda interactio n is weakly attractive.