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Title: Fully Coupled Channel Approach to Doubly Strange s-Shell Hypernuclei

We describe ab initio calculations of doubly strange, S=-2, s-shell hypernuclei ({sub {lambda}}{sub {lambda}}{sup 4}H, {sub {lambda}}{sub {lambda}}{sup 5}H, {sub {lambda}}{sub {lambda}}{sup 5}He, and {sub {lambda}}{sub {lambda}}{sup 6}He) as a first attempt to explore the few-body problem of the full-coupled channel scheme for these systems. The wave function includes {lambda}{lambda}, {lambda}{sigma}, N{xi}, and {sigma}{sigma} channels. Minnesota NN, D2{sup '} YN, and simulated YY potentials based on the Nijmegen hard-core model are used. Bound-state solutions of these systems are obtained. We find that a set of phenomenological B{sub 8}B{sub 8} interactions among the octet baryons in S=0,-1, and -2 sectors, which is consistent with all of the available experimental binding energies of S=0,-1, and -2 s-shell (hyper)nuclei, can predict a particle stable bound state of {sub {lambda}}{sub {lambda}}{sup 4}H. For {sub {lambda}}{sub {lambda}}{sup 5}H and {sub {lambda}}{sub {lambda}}{sup 5}He, {lambda}N-{sigma}N and {xi}N-{lambda}{sigma} potentials significantly affect the net {lambda}{lambda}-N{xi} coupling, and a large {xi} probability is obtained even for a weaker {lambda}{lambda}-N{xi} potential.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801 (Japan)
  2. Department of Information Science, Gifu University, Gifu 501-1193 (Japan)
  3. College of Science and Technology, Nihon University, Funabashi 274-8501 (Japan)
  4. Department of Physics, Mandalay University, Mandalay (Myanmar)
Publication Date:
OSTI Identifier:
20696304
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 94; Journal Issue: 20; Other Information: DOI: 10.1103/PhysRevLett.94.202502; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BINDING ENERGY; BOUND STATE; COUPLED CHANNEL THEORY; HELIUM 5; HELIUM 6; HYDROGEN 4; HYDROGEN 5; HYPERNUCLEI; LAMBDA BARYONS; MATHEMATICAL SOLUTIONS; NUCLEAR POTENTIAL; NUCLEON-HYPERON INTERACTIONS; NUCLEON-NUCLEON INTERACTIONS; PROBABILITY; SHELL MODELS; SIGMA BARYONS; WAVE FUNCTIONS; XI BARYONS