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arXiv 2111.01147hep-lathep-exhep-phnucl-th
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格点量子色动力学中的$\bar{b}\bar{c}\,q_1q_2$四夸克态

$\bar{b}\bar{c}\,q_1q_2$four-quark states from Lattice QCD

M. Padmanath, Nilmani Mathur

备注：
9 pages, 6 figures. Proceedings of the 38th International Symposium on Lattice Field Theory (LATTICE2021)
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摘要：

本文给出了夸克含量为$\bar{b}\bar{c}q_1q_2$的四夸克态的晶格计算结果，其中$q_1,q_2 \in u,d,s$ .对于自旋为1的态，当轻夸克（$q_1, q_2$）质量较轻时，我们发现至少有一个能级低于可能的弹性阈值能级。这些计算是在三个动力学$N_f = 2+1+1$高度改进的交错夸克系综上进行的，晶格间距约为0.12，0.09和0.06 fm。我们使用的重叠作用的光的魅力夸克，而非微扰改进系数的非相对论性作用的底夸克。

英文摘要：

We present the results of a lattice calculation of four-quark states with the quark contents $\bar{b}\bar{c}q_1q_2$ where $q_1,q_2 \in u,d,s$. For the spin 1 states, when the light quark ($q_1, q_2$) masses are lighter, we find at least one energy level below the possible elastic threshold energy levels. These calculations are performed on three dynamical $N_f = 2+1+1$ highly improved staggered quark ensembles at lattice spacings of about 0.12, 0.09, and 0.06 fm. We use the overlap action for light to charm quarks while a non-relativistic action with non-perturbatively improved coefficients is employed for the bottom quark.

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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