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arXiv 2103.09739hep-phhep-exnucl-th
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$^{3}S_1$和$^{5}S_2$通道中$NΩ$重子的质谱

Mass spectra of $NΩ$ dibaryons in the $^{3}S_1$ and $^{5}S_2$ channels

Xiao-Hui Chen, Qi-Nan Wang, Wei Chen, Hua-Xing Chen

摘要:

用QCD求和规则研究了分别用$J^{P}=1^{+}$和$2^{+}$的$^{3}S_1$和$^{5}S_2$通道中的$NΩ$重子的质量谱。在分子图像中构造了两个二重子内插流,并计算了它们的关联函数和谱密度。结果表明,在$^{5}S_2$通道中可能存在一个结合能约为$21\ \mathrm{MeV}$的$NΩ$重子束缚态.具有$J^{P}=1^{+}$的$^{3}S_1$-$NΩ$重子的质量被预测为高于$NΩ$和$ΛΞ$阈值,因此可以在S波中直接衰变到这些末态。$NΩ(^{5}S_2)$重子束缚态在D波中通过夸克重排机制衰变为八重态-八重态$ΛΞ$和$ΣΞ$。这些$NΩ$重子的存在有可能在将来的相对论重离子碰撞实验中得到证实。

英文摘要:

We study the mass spectra of the $NΩ$ dibaryons in the $^{3}S_1$ and $^{5}S_2$ channels with $J^{P}=1^{+}$ and $2^{+}$ respectively, by using the method of QCD sum rules. We construct two dibaryon interpolating currents in the molecular picture and calculate their correlation functions and spectral densities up to dimension-16 condensates. Our results indicate that there may exist an $NΩ$ dibaryon bound state in the $^{5}S_2$ channel with a binding energy of about $21\ \mathrm{MeV}$. The masses of the $^{3}S_1$ $NΩ$ dibaryons with $J^{P}=1^{+}$ are predicted to be higher than the $NΩ$ and $ΛΞ$ thresholds, and thus can decay into these final states directly in S-wave. The $NΩ(^{5}S_2)$ dibaryon bound state can decay into the octet-octet final states $ΛΞ$ and $ΣΞ$ in D-wave via the quark rearrangement mechanism. The existence of these $NΩ$ dibaryons may be identified in the relativistic heavy-ion collision experiments in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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