Hypertriton:. Lambda. leftrightarrow. Sigma. conversion and tensor forces

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.41.2787· OSTI ID:7095151

Afnan, I R ^[1]; Gibson, B F ^[2]

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1. School of Physical Sciences, The Flinders University of South Australia, Bedford Park, South Australia 5042, (Australia)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)

The separable potential equations that describe the hypertriton when {Lambda}{ital N}-{Sigma}{ital N} coupling and noncentral {ital NN} and {ital YN} forces are included, are formulated. Numerical solution of the equations for various potential models shows that {Lambda}-{Sigma} conversion in the {ital YN} interaction plays a significant role, even in the lightly bound {sub {Lambda}}{sup 3}H. When the {Sigma}{ital N} channel is formally eliminated, the dispersive energy dependence of the resulting {Lambda}{ital N} effective interaction is repulsive, whereas the resulting {Lambda}{ital NN} three-body force is attractive. The contribution of the {Lambda}{ital N} tensor force is shown to depend upon the inclusion of the {ital NN} tensor force and the relative sign of the {sup 3}{ital S}{sub 1}-{sup 3}{ital D}{sub 1} {ital NN} and {Lambda}{ital N} tensor coupling. Also, a model which supports a {Sigma}{ital N} bound state in the continuum appears to severely overbind the {sub {Lambda}}{sup 3}H system, indicating that such a phenomenon is not present in the {ital K}{sup {minus}}{ital d}{r arrow}{Lambda}{ital N}{pi} reaction.

• OSTI ID: 7095151
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 41:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BINDING ENERGY
CHARGED PARTICLES
COUPLED CHANNEL THEORY
ELEMENTARY PARTICLES
ENERGY
ENERGY DEPENDENCE
EQUATIONS
FADDEEV EQUATIONS
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERNUCLEI
HYPERONS
INTERACTIONS
ISOSPIN
LAMBDA BARYONS
LAMBDA PARTICLES
NUCLEAR FRAGMENTS
NUCLEI
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
SIGMA BARYONS
SIGMA PARTICLES
STRANGE PARTICLES
SYMMETRY BREAKING
TENSOR FORCES
TRITONS