arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2107.04860hep-phhep-lat
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夸克模型与格点量子色动力学耦合的新通道框架:近阈值$D_s$态的研究

Novel coupled channel framework connecting quark model and lattice QCD: an investigation on near-threshold $D_s$ states

Zhi Yang, Guang-Juan Wang, Jia-Jun Wu, Makoto Oka, Shi-Lin Zhu

摘要:

提出了一种从格点量子色动力学有限体积能级中提取近阈值共振态的新框架,并应用该框架阐明了正宇称$D_s$的结构。将夸克模型、夸克对产生机制和$D^{(*)}K$相互作用引入到哈密顿有效场论中。裸$1^+$ $c\bar s$态几乎完全由重夸克自旋基的态给出。物理$D^*_{s0}(2317)$和$D^*_{s1}(2460)$是裸$c\bar s$核和$D^{(*)}K$组分的混合物,而$D^*_{s1}(2536)$和$D^*_{s2}(2573)$几乎以裸$c\bar{s}$为主。此外,我们的模型再现明确的能级交叉的$D^*_{s1}(2536)$与散射态在有限体积。

英文摘要:

A novel framework is proposed to extract near-threshold resonant states from finite-volume energy levels of lattice QCD and is applied to elucidate structures of the positive parity $D_s$. The quark model, the quark-pair-creation mechanism and $D^{(*)}K$ interaction are incorporated into the Hamiltonian effective field theory. The bare $1^+$ $c\bar s$ states are almost purely given by the states with heavy-quark spin bases. The physical $D^*_{s0}(2317)$ and $D^*_{s1}(2460)$ are the mixtures of bare $c\bar s$ core and $D^{(*)}K$ component, while the $D^*_{s1}(2536)$ and $D^*_{s2}(2573)$ are almost dominated by bare $c\bar{s}$. Furthermore, our model reproduces the clear level crossing of the $D^*_{s1}(2536)$ with the scattering state at a finite volume.

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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