论文标题
旨在了解各种模型的完全重型的四夸克国家
Towards the understanding of fully-heavy tetraquark states from various models
论文作者
论文摘要
我们使用颜色磁相互作用模型（CMIM），传统的组成夸克模型（CQM）和多Quark Color Flux-tux-tube模型（MCFTM）来系统地研究状态$ [q_1q_2] [q_1q_2] [\ bar {q} _3 _3 _3 \ bar {Q} _4] _4] $（$ q = c = c = c，bar {q} _3 \ bar {q} _3 \ bar {q} _4] $（$）动力学研究表明，CMIM无法通过有效组成夸克质量完全吸收QCD动力学效应，并在相同的空间构型的假设下高估了州的颜色磁相互作用。库仑相互作用在重型哈子的动态模型计算中起关键作用，这诱发了这样一个事实，即$ [q_1q_2] [q_1q_2] [\ bar {q} _3 \ bar {q} _4] $都无法在动态模型中找到。颜色配置$ \左[[q_1q_2] _ {\ MathBf {6} _c} [\ bar {q} _3 \ bar {q} _4] _ {\ bar {\ bar {\ bar {\ bar {\ shigbf {6}}} _ c} _ c} _ c} _ c} _ c} _ MATH} $ [q_1q_2] _ {\ Mathbf {6} _C} $和$ [\ bar {q} _3 \ bar {q} _4] _ {\ bar {\ bar {\ mathbf {6} _ c} $之间的强库仑吸引力。颜色配置$ \左[[q_1q_2] _ {\ bar {\ Mathbf {3}} _ C} [\ bar {q} _2 \ bar {q} _4] _ {\ artbf} $ [Q_1Q_2] _ {\ bar {\ Mathbf {3}} _ C} $和$ [\ bar {q} _2 \ bar {q} _4] _ {\ Mathbf {3} _c} $。 LHCB最近观察到的$ J/ψ$ -PAIR共振很难在CMIM中容纳。在各种动态模型中，范围为6.2至6.8 GEV的宽结构范围为6.2至6.8 GEV。狭窄的结构$ x（6900）$可以标识为激发状态$ [cc] [\ bar {c} \ bar {c}] $，$ l = 1 $（$ l = 2 $）在CQM（MCFTM）中。
We use a color-magnetic interaction model (CMIM), a traditional constituent quark model (CQM) and a multiquark color flux-tube model (MCFTM) to systematically investigate the properties of the states $[Q_1Q_2][\bar{Q}_3\bar{Q}_4]$ ($Q=c,b$). The dynamical investigation indicates that the CMIM can not completely absorb QCD dynamical effects through the effective constituent quark mass and overestimates the color-magnetic interaction in the states under the assumption of the same spatial configurations. The Coulomb interaction plays a critical role in the dynamical model calculations on the heavy hadrons, which induces the fact that none of bound states $[Q_1Q_2][\bar{Q}_3\bar{Q}_4]$ can be found in the dynamical models. The color configuration $\left[[Q_1Q_2]_{\mathbf{6}_c}[\bar{Q}_3\bar{Q}_4]_{\bar{\mathbf{6}}_c}\right]_{\mathbf{1}}$ should be taken seriously in the ground states due to the strong Coulomb attraction between the $[Q_1Q_2]_{\mathbf{6}_c}$ and $[\bar{Q}_3\bar{Q}_4]_{\bar{\mathbf{6}}_c}$. The color configuration $\left[[Q_1Q_2]_{\bar{\mathbf{3}}_c}[\bar{Q}_2\bar{Q}_4]_{\mathbf{3}_c}\right]_{\mathbf{1}}$ is absolutely dominant in the excited states because of the strong Coulomb attraction within the $[Q_1Q_2]_{\bar{\mathbf{3}}_c}$ and $[\bar{Q}_2\bar{Q}_4]_{\mathbf{3}_c}$. The $J/Ψ$-pair resonances recently observed by LHCb are difficult to be accommodated in the CMIM. The broad structure ranging from 6.2 to 6.8 GeV can be described as the ground tetraquark state $[cc][\bar{c}\bar{c}]$ in the various dynamical models. The narrow structure $X(6900)$ can be identified as the excited state $[cc][\bar{c}\bar{c}]$ with $L=1$ ($L=2$) in the CQM (MCFTM).
