Strange Hadronic Matter with Strong and Weak YY Interactions
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Graphical Abstract
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Abstract
A modified quark meson coupling (MQMC) model is extended to include Λhyperons and Ξhyperons. The extended model is then used to study the equation of state (EOS) for strange hadronic matter. A weak ΛΛ interaction deduced from recent observation of 6ΛΛHe double hypernucleus is adopted in the calculation. The resultant EOS is compared with that deduced from a strong ΛΛ interaction. It is found that while the system with the strong ΛΛ interaction is more deeply bound than ordinary nuclear matter due to the opening of new degrees of freedom， the system with the weak ΛΛ interaction is rather loosely bound compared to the later. It is necessary to introduce the strange mesons σ*and in the MQMC model to describe properly the interaction between the hyperons in either strong or weak ΛΛ interaction case.
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