Effective Hyperon-Nucleon Interactions in the Relativistic Mean Field Theory

  • The effective Λ nucleon interaction in single Λ hypernuclei is studied using the Relativistic Mean Field theory. Five sets of hyperon meson coupling parameters,for Λ-σ and Λ-ω interactions, are obtained by fitting the recent data of the binding energy of a Λ in the 1s state of 13Λ C,B1s1/2Λ. The detailed method is to fix one of the parameters to be a special value such as 2/3 or 1,or to suppose two of them be equal,and then the parameter sets are deduced. With these parameter sets determined from only this experimental quantity,we calculate the single particle spectra of Λ in single-Λ hypernuclei for a wide range of mass number from A=9 to A=208. The calculations reproduce the available data well.
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LV Hong-Feng, LONG Wen-Hui, MENG Jie and ZHOU Shan-Gui. Effective Hyperon-Nucleon Interactions in the Relativistic Mean Field Theory[J]. Chinese Physics C, 2002, 26(9): 933-940.
LV Hong-Feng, LONG Wen-Hui, MENG Jie and ZHOU Shan-Gui. Effective Hyperon-Nucleon Interactions in the Relativistic Mean Field Theory[J]. Chinese Physics C, 2002, 26(9): 933-940. shu
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Received: 2001-10-16
Revised: 1900-01-01
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Effective Hyperon-Nucleon Interactions in the Relativistic Mean Field Theory

    Corresponding author: MENG Jie,
  • School of Physics,Peking University,Beijing 100871,China2 Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100080,China3 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China

Abstract: The effective Λ nucleon interaction in single Λ hypernuclei is studied using the Relativistic Mean Field theory. Five sets of hyperon meson coupling parameters,for Λ-σ and Λ-ω interactions, are obtained by fitting the recent data of the binding energy of a Λ in the 1s state of 13Λ C,B1s1/2Λ. The detailed method is to fix one of the parameters to be a special value such as 2/3 or 1,or to suppose two of them be equal,and then the parameter sets are deduced. With these parameter sets determined from only this experimental quantity,we calculate the single particle spectra of Λ in single-Λ hypernuclei for a wide range of mass number from A=9 to A=208. The calculations reproduce the available data well.

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