Different effect of the hyperons and on the nuclear core
Theoretical Physics Division, Nankai Institute of Mathematics, Nankai University, 300071, Tianjin, PRC
2 Department of Physics, Nankai University, 300071, Tianjin, PRC
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We demonstrate the different effect of strange impurities ( and ) on the static properties of nuclei within the framework of the relativistic mean-field model. Systematic calculations show that the glue-like role of the -hyperon is universal for all -hypernuclei considered. However, the -hyperon has a glue-like role only for the protons distribution in nuclei, while for the neutrons distribution it plays a repulsive role. On the other hand, the -hyperon attracts the surrounding neutrons and reveals a repulsive force to the protons. Possible explanations of the above observation are discussed.
© Società Italiana di Fisica and Springer-Verlag, 2004