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Two-frequency shell model for hypernuclei and meson-exchange hyperon-nucleon potentials

Journal Article · · Physical Review. C, Nuclear Physics
 [1];  [2];  [1];  [3];  [4]
  1. Institute of Physics, Academia Sinica, Taipei, Taiwan, Republic of China (China)
  2. National Taipei University of Technology, Taipei, Taiwan, Republic of China (China)
  3. Physics Division, Argonne National Laboratory, Argonne, Illinois 60493 (United States)
  4. Center for the Subatomic Structure of Matter, University of Adelaide, Adelaide, SA5005, (Australia)
+ Show Author Affiliations
A two-frequency shell model is proposed for investigating the structure of hypernuclei starting with a hyperon-nucleon potential in free space. In a calculation using the folded-diagram method for {sub {lambda}}{sup 16}O, the {lambda} single particle energy is found to have a saturation minimum at an oscillator frequency ({Dirac_h}/2{pi}){omega}{sub {lambda}}{approx_equal}10 MeV, for the {lambda} orbit, which is considerably smaller than ({Dirac_h}/2{pi}){omega}{sub N}=14 MeV for the nucleon orbit. The spin-dependence parameters derived from the Nijmegen NSC89 and NSC97f potentials are similar, but both are rather different from those obtained with the Juelich-B potential. The {lambda}NN three-body interactions induced by {lambda}N-{sigma}N transitions are important for the spin parameters, but relatively unimportant for the low-lying states of {sub {lambda}}{sup 16}O. (c) 2000 The American Physical Society.
OSTI ID:
20215660
Journal Information:
Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 61; ISSN 0556-2813; ISSN PRVCAN
Country of Publication:
United States
Language:
English

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HYPERNUCLEI
LAMBDA BARYONS
MESON-NUCLEON INTERACTIONS
NUCLEAR STRUCTURE
NUCLEON-HYPERON INTERACTIONS
OXYGEN 16
SHELL MODELS
SPIN
THEORETICAL DATA
THREE-BODY PROBLEM