Search for double-Lambda hypernuclei formation via (Xi(-),C-12)(atom)-> B-12(Lambda Lambda)+n - art. no. 027601

Citation
P. Khaustov et al., Search for double-Lambda hypernuclei formation via (Xi(-),C-12)(atom)-> B-12(Lambda Lambda)+n - art. no. 027601, PHYS REV C, 6102(2), 2000, pp. 7601
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
6102
Issue
2
Year of publication
2000
Database
ISI
SICI code
0556-2813(200002)6102:2<7601:SFDHFV>2.0.ZU;2-W
Abstract
Measurement of the energy of neutrons in coincidence with the production of free Xi(-) hyperons can be used to determine the masses of B-12(Lambda Lam bda) hypernuclear states and branching ratios of their formation from (Xi(- ), C-12)(atom) --> B-12(Lambda Lambda)+n. The E885 Collaboration utilized t he Alternating Gradient Synchrotron 1.8 GeV/c K- beam incident on a diamond target to accumulate the largest-to-date data sample of (K-,K+) events. A total of about 3x10(5) (K-,K+) events have been collected and analyzed. The neutron spectrum shows no apparent peaks from the neutron-emission channel of double-Lambda hypernuclear formation from (Xi(-), C-12)(atom) decay. Th e upper limit on the branching ratio of the above process has been set to b e at or below 4% in the region of expected neutron energies.