Study about Light Hypernuclei and YN Interaction Based on Chiral SU(3) Quark Model |
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| Authors: | ZHANG Miao-Jing SHEN Peng-Nian LIU Xian-Hui KONG Fan-Xin |
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| Affiliation: | Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039,China2 Department of Physics,Guangxi Teacher's University,Guilin 541004,China3 Institute or Theoretical Physics,The Chinese Academy of Sciences,Beijing 100080,China4 Center of Theoretical Nuclear Physics,National Lab. of Heavy Ion Accelerator,Lanzhou 730000,China |
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| Abstract: | In terms of the YN interaction based on the chiral SU(3) quark model,the spectra of light hypernuclei 4ΛH,4ΛHe and 5ΛHe are calculated. The result shows that the effective local ΛN potential,as an approximation,cannot offer a reasonable explanation of the empirical data, while the non-local ΛN potential,also as an approximation,can provide a reasonable range of the binding energy of 5ΛHe and correct ordering of the energy levers of 4ΛH,4ΛHe. This indicates that the non-local character of the effective YN interaction plays an important role in binding behavior. The upper bounds and lower bounds of energy levels are given by employing two sets of model parameters in the calculation. Thus,the experimental data of hypernuclei can provide more information as the constraints of model. In the present stage,YN interaction(no matter phenomenology of theoretical interaction) cannot be finalized due to lack of experimental data. Utilizing experimental data,it is possible to optimize model parameters in the theoretical studies of YN interaction. |
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