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Five-Body Cluster Structure of the Double-{Lambda} Hypernucleus {sub {Lambda}{Lambda}}{sup 11}Be

Journal Article · · Physical Review Letters
 [1];  [2];  [3];  [4]
  1. RIKEN Nishina Center, RIKEN, Hirosawa 2-1, Wako, Saitama, 351-0198 (Japan)
  2. Department of Physics, Kyushu University, Fukuoka 812-8581 (Japan)
  3. Physics Section, Tsuru University, Tsuru 402-8555 (Japan)
  4. Laboratory of Physics, Osaka Electro-Communications University, Neyagawa 572-8530 (Japan)
+ Show Author Affiliations

Energy levels of the double {Lambda} hypernucleus, {sub {Lambda}{Lambda}}{sup 11}Be are calculated within the framework of a {alpha}{alpha}n{Lambda}{Lambda} five-body model. Interactions between constituent particles are determined so as to reproduce reasonably the observed low-energy properties of the {alpha}{alpha}, {alpha}{alpha}n nuclei and the existing data for {Lambda}-binding energies of the {alpha}{Lambda}, {alpha}{alpha}{Lambda}, {alpha}n{Lambda}, and {alpha}{alpha}n{Lambda} systems. An effective {Lambda}{Lambda} interaction is constructed so as to reproduce, within the {alpha}{Lambda}{Lambda} three-body model, the B{sub {Lambda}{Lambda}}of {sub {Lambda}{Lambda}}{sup 6}He, which was extracted from the emulsion experiment, the NAGARA event. With no adjustable parameters for the {alpha}{alpha}n{Lambda}{Lambda} system, B{sub {Lambda}{Lambda}}of the ground and bound excited states of {sub {Lambda}{Lambda}}{sup 11}Be are calculated with the Gaussian expansion method. The Hida event, recently observed at KEK-E373 experiment, is interpreted as an observation of the ground state of the {sub {Lambda}{Lambda}}{sup 11}Be.

OSTI ID:
21410695
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BARYONS
BINDING ENERGY
COLLOIDS
DISPERSIONS
ELEMENTARY PARTICLES
EMULSIONS
ENERGY
ENERGY LEVELS
EXCITED STATES
FERMIONS
GROUND STATES
HADRONS
HYPERNUCLEI
HYPERONS
INTERACTIONS
KEK LINAC
LAMBDA BARYONS
LAMBDA PARTICLES
LINEAR ACCELERATORS
MANY-BODY PROBLEM
NUCLEAR FRAGMENTS
NUCLEI
PARTICLE INTERACTIONS
STRANGE PARTICLES
THREE-BODY PROBLEM