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强和弱Y-Y相互作用下的奇异强子物质

宋宏秋 苏汝铿 鲁定辉 钱伟良

宋宏秋, 苏汝铿, 鲁定辉, 钱伟良. 强和弱Y-Y相互作用下的奇异强子物质[J]. 原子核物理评论, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137
引用本文: 宋宏秋, 苏汝铿, 鲁定辉, 钱伟良. 强和弱Y-Y相互作用下的奇异强子物质[J]. 原子核物理评论, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137
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

强和弱Y-Y相互作用下的奇异强子物质

doi: 10.11804/NuclPhysRev.21.02.137

Strange Hadronic Matter with Strong and Weak YY Interactions

  • 摘要: 把修正的夸克-介子耦合模型推广到包含奇异性的情形, 并用来研究奇异强子物质的状态方程. 从最新的6ΛΛHe双超核的实验导出的弱ΛΛ相互作用和过去采用的强ΛΛ相互作用同时被用于计算. 比较发现, 具有强Λ-Λ相互作用的系统束缚得比正常核物质要紧, 而具有弱ΛΛ相互作用的系统则比正常核物质束缚得要松得多. 无论强还是弱相互作用情况, 为了合适地描述修正的夸克介子耦合模型中超子-超子(YY)相互作用, 必须引进σ*和介子.
    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.
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出版历程
  • 收稿日期:  1900-01-01
  • 修回日期:  1900-01-01
  • 刊出日期:  2004-06-20

强和弱Y-Y相互作用下的奇异强子物质

doi: 10.11804/NuclPhysRev.21.02.137

摘要: 把修正的夸克-介子耦合模型推广到包含奇异性的情形, 并用来研究奇异强子物质的状态方程. 从最新的6ΛΛHe双超核的实验导出的弱ΛΛ相互作用和过去采用的强ΛΛ相互作用同时被用于计算. 比较发现, 具有强Λ-Λ相互作用的系统束缚得比正常核物质要紧, 而具有弱ΛΛ相互作用的系统则比正常核物质束缚得要松得多. 无论强还是弱相互作用情况, 为了合适地描述修正的夸克介子耦合模型中超子-超子(YY)相互作用, 必须引进σ*和介子.
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.

English Abstract

宋宏秋, 苏汝铿, 鲁定辉, 钱伟良. 强和弱Y-Y相互作用下的奇异强子物质[J]. 原子核物理评论, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137
引用本文: 宋宏秋, 苏汝铿, 鲁定辉, 钱伟良. 强和弱Y-Y相互作用下的奇异强子物质[J]. 原子核物理评论, 2004, 21(2): 137-141. doi: 10.11804/NuclPhysRev.21.02.137
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

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