氘核状全轻六夸克的扩散蒙特卡罗研究
Diffusion Monte Carlo study of deuteron-like fully light hexaquarks
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中文总结 AI 辅助
研究在组分夸克模型中对全轻六夸克进行扩散蒙特卡罗研究，考虑紧凑和重子 - 重子状排列，发现紧凑六夸克态不受青睐，部分重子 - 重子状构型接近阈值且有类似分子态结构，一种构型类似氘核，能量略超阈值。
中文摘要 AI 辅助
我们在组分夸克模型内对包含三个u夸克和三个d夸克的全轻六夸克进行扩散蒙特卡罗研究。分别考虑了紧凑和重子 - 重子状排列。发现所有紧凑六夸克构型远高于其相应的重子 - 重子阈值，表明在该模型的轻夸克扇区中深度束缚的紧凑六夸克态不受青睐。相比之下，几个重子 - 重子状构型接近但高于NN、NΔ和ΔΔ阈值，并显示出与分子态兼容的空间结构。一种构型表现出由几飞米分隔的两个明确的核子状子簇，与氘核的空间结构非常相似，尽管其计算能量仍略高于相应阈值。
英文摘要
We perform a Diffusion Monte Carlo study of fully light hexaquarks containing three $u$ quarks and three $d$ quarks within a constituent-quark model. Both compact and baryon--baryon-like arrangements were considered separately. All compact hexaquark configurations are found well above their corresponding baryon--baryon thresholds, suggesting that deeply bound compact six-quark states are not favored in the light-quark sector within this model. By contrast, several dibaryon-like configurations lie close, but above, to the $NN$, $NΔ$, and $ΔΔ$ thresholds and show spatial structures compatible with molecular states. One configuration exhibits two well-defined nucleon-like subclusters separated by several femtometers, characteristic of deuteron-like spatial clustering, although its calculated energy remains slightly above the corresponding threshold.
发表机构
- Universidad Pablo de Olavide（巴勃罗·德·奥拉维德大学）
- Universidad de Granada（格拉纳达大学）
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