Strange Hadronic Matter with Strong and Weak YY Interactions

SONG Hong-qiu; SU Ru-keng; LU Ding-hui; QIAN  Wei-liang

doi:10.11804/NuclPhysRev.21.02.137

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Article Navigation > Nuclear Physics Review > 2004 > 21(2): 137-141

SONG Hong-qiu, SU Ru-keng, LU Ding-hui, QIAN Wei-liang. Strange Hadronic Matter with Strong and Weak YY Interactions[J]. Nuclear Physics Review, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137

Citation:

SONG Hong-qiu, SU Ru-keng, LU Ding-hui, QIAN Wei-liang. Strange Hadronic Matter with Strong and Weak YY Interactions[J]. Nuclear Physics Review, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137

Strange Hadronic Matter with Strong and Weak YY Interactions

doi: 10.11804/NuclPhysRev.21.02.137

1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;2 Department of Physics, Fudan University, Shanghai 200433, China;3 Department of Physics, Zhejiang University, HangZhou 310027, Zhejiang, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2004-06-20

Abstract

A modified quark meson coupling (MQMC) model is extended to include Λhyperons and Ξhyperons. The extended model is then used to study the equation of state (EOS) for strange hadronic matter. A weak ΛΛ 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 ΛΛ 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 ΛΛ 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.
- modified quark meson coupling model,
- strange hadronic matter,
- Y-Y interaction
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Strange Hadronic Matter with Strong and Weak YY Interactions

doi: 10.11804/NuclPhysRev.21.02.137

1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;2 Department of Physics, Fudan University, Shanghai 200433, China;3 Department of Physics, Zhejiang University, HangZhou 310027, Zhejiang, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2004-06-20

Key words:

Abstract: A modified quark meson coupling (MQMC) model is extended to include Λhyperons and Ξhyperons. The extended model is then used to study the equation of state (EOS) for strange hadronic matter. A weak ΛΛ 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 ΛΛ 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 ΛΛ 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.