ZHANG Li-Liang1, SONG Hong-Qiu1,3, WANG Ping4, SU Ru-Keng2
1Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800
2Department of Physics, Fudan University, Shanghai 200433
3Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
4Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039
1Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800
2Department of Physics, Fudan University, Shanghai 200433
3Research Center of Nuclear Theory of National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000
4Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100039
Abstract： The strange hadronic matter with nucleon, Λ-hyperon and Ξ-hyperon is studied by using a chiral symmetry model in a mean-field approximation. The saturation properties and stabilities of the strange hadronic matter are discussed. The result indicates a quite large strangeness fraction (fs) region where the strange hadronic matter is stable against particle emission. In the large fs region, the Ξ component dominates, resulting in a deep minimum in the curve of the binding energy per baryon EB versus the strangeness fraction fs with (EB, fs) ~_ (-26.0MeV,1.23).
2000, Vol. 17 
