Possible existence of a bound state in sub. Sigma. sup 7 Li

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.46.1315· OSTI ID:6949034

Yamada, T ^[1]; Ikeda, K ^[2]

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1. Department of Applied Science, Kochi Women's University, Kochi 780 (Japan)
2. Department of Physics, Niigata University, Niigata 950-21 (Japan) The Institute of Physical and Chemical Research, Wako 351-01 (Japan)

The possible existence of a bound {sub {Sigma}}{sup 7}Li state is investigated within the frame of the microscopic {alpha}+ 2{ital N}''+{Sigma} cluster model by employing an effective {Sigma}-{ital N} interaction which reproduces the experimental binding energy and width of {sub {Sigma}}{sup 4}He. We found one bound state of {sub {Sigma}}{sup 7}Li with about a 1.2 MeV binding energy and about a 5.4 MeV width, which is composed mainly of ({sup 6}Li(g.s.){direct product}{Sigma}{sup 0}) and ({sup 6}He(g.s.){direct product}{Sigma}{sup +}) configurations. It is emphasized that the ({bold t}{sub {ital N}}{center dot}{bold t}{sub {Sigma}})({bold s}{sub {ital N}}{center dot}{bold s}{sub {Sigma}}) term of {Sigma}-{ital N} interaction plays an important role to produce the bound state. If the bound state is observed in a strangeness exchange reaction such as a {sup 7}Li({ital K}{sup {minus}},{pi}{sup {minus}}){sub {Sigma}}{sup 7}Li experiment, we can get direct information on the ({bold t}{sub {ital N}}{center dot}{bold t}{sub {Sigma}}) ({bold s}{sub {ital N}}{center dot}{bold s}{sub {Sigma}}) term of {Sigma}-{ital N} interaction.

• OSTI ID: 6949034
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 46:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663120* -- Nuclear Structure Models & Methods-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
BARYON-BARYON INTERACTIONS
BARYONS
BOUND STATE
CLUSTER MODEL
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERNUCLEI
HYPERONS
INTERACTIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM 7
LITHIUM ISOTOPES
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 01-10
NUCLEAR FRAGMENTS
NUCLEAR MODELS
NUCLEI
NUCLEON-HYPERON INTERACTIONS
ODD-EVEN NUCLEI
PARTICLE INTERACTIONS
SIGMA BARYONS
STABLE ISOTOPES
STRANGE PARTICLES