Abstract.
We demonstrate the different effect of strange impurities (\(\Lambda\) and \(\Xi\)) 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 \(\Lambda\)-hyperon is universal for all \(\Lambda\)-hypernuclei considered. However, the \(\Xi^-\)-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 \(\Xi^0\)-hyperon attracts the surrounding neutrons and reveals a repulsive force to the protons. Possible explanations of the above observation are discussed.
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Communicated by A. Molinari
Received: 10 March 2003, Revised: 6 November 2003, Published online: 5 May 2004
PACS:
21.80. + a Hypernuclei - 24.10.Cn Many-body theory
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Tan, YH., Ning, PZ. Different effect of the hyperons \(\Lambda\) and \(\Xi\) on the nuclear core. Eur. Phys. J. A 20, 257–262 (2004). https://doi.org/10.1140/epja/i2003-10151-x
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DOI: https://doi.org/10.1140/epja/i2003-10151-x