1Department of Technical Physics, and MOE Key Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Centre of Nuclear Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
Lambda Hypernuclei in a Chiral Hadronic Model
LIANG Yin-Hua1;GUO Hua1,2
1Department of Technical Physics, and MOE Key Laboratory of Heavy Ion Physics, Peking University, Beijing 100871
2Centre of Nuclear Theoretical Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
Abstract： Nuclear matter calculations in a chiral hadronic model have been performed. It has been found that the scalar and the vector potentials and binding energies per nucleon in the chiral hadronic model are very close to those of the microscopic relativistic Brueckner--Hartree--Fock calculations. The good results for finite nuclei can be obtained in the mean field approximation only if scalar mass ms and coupling constant gs have been improved with the fixed values of cs2 ≡gs2 (M/ms)2 as those given by the original parameter sets of the chiral hadronic model. Then the chiral hadronic model is extended to lambda hypernuclei. Our results predicted by the chiral hadronic model are compared with those by the nonlinear Walecka model. It has been shown that the hadronic model can also be used to describe lambda hypernuclei successfully.
2005, Vol. 22 
