Lambda N-. sigma. N coupling in S-shell Lambda-hypernuclei

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6736470

Gibson, B F

The inclusion of Lambda N-..sigma..N coupling in the A = 4 Lambda-hypernuclei is shown to be required in order to obtain proper ordering of the 0/sup +/ ground state and 1/sup +/ spin-flip excited state, when exact four-body equations are solved. It is argued that suppression of the off-diagonal Lambda N-..sigma..N coupling in the A = 5 system, similar to that in the A = 4 isodoublet, should account for the anomalously small binding of /sup 5/He. An alternative quark model explanation is also considered.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6736470
• Report Number(s): LA-UR-84-1849; CONF-8405193-12; ON: DE84013899
• Country of Publication: United States
• Language: English

Related Subjects

645207 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. Greater than 1-- (-1987)
653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
BARYONS
BINDING ENERGY
COMPOSITE MODELS
COUPLING
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITED STATES
FERMIONS
HADRONS
HELIUM 5
HELIUM ISOTOPES
HYPERNUCLEI
HYPERONS
ISOTOPES
LAMBDA PARTICLES
LIGHT NUCLEI
MATHEMATICAL MODELS
NUCLEAR FRAGMENTS
NUCLEI
PARTICLE MODELS
QUARK MODEL
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SIGMA PARTICLES
SPIN FLIP
STRANGE PARTICLES