Evidence of Xi hypernuclear production in the C-12(K-, K+)(Xi)Be-12 reaction - art. no. 054603

Citation
P. Khaustov et al., Evidence of Xi hypernuclear production in the C-12(K-, K+)(Xi)Be-12 reaction - art. no. 054603, PHYS REV C, 6105(5), 2000, pp. 4603
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
0556-2813 → ACNP
Volume
6105
Issue
5
Year of publication
2000
Database
ISI
SICI code
0556-2813(200005)6105:5<4603:EOXHPI>2.0.ZU;2-E
Abstract
The E885 Collaboration utilized the 1.8 GeV/cK(-) beam line at the Alternat ing Gradient Synchrotron (AGS) to accumulate greater than 10 times the worl d's existing data sample of (K-,Rf) events on carbon. A total of about 3x10 (5) (K-,K+) events were collected and analyzed. drop hypernuclear states ar e expected to be produced through the reaction K- + C-12-->K+ + Be-12(drop) . A signal could also result from direct production of (11)(Lambda)Bei+Lamb da without a distinct drop intermediate state. The measured missing-mass sp ectrum indicates the existence of a signal below the threshold for free dro p(-) production that cannot be explained by background or effects of limite d resolution. Although the resolution was not sufficient to resolve discret e hypernuclear states, the excess of events in the region of missing mass, kinematically inaccessible in free drop(-) production, can be compared with theoretical predictions for Be-12(drop) production. Reasonable agreement b etween the data and theory is achieved by assuming a drop-nucleus potential well depth V-0 drop of about 14 MeV within the Woods-Saxon prescription.