论文标题
完全沉重的四夸克的系统学
Systematics of fully heavy tetraquarks
论文作者
论文摘要
在这项工作中，我们在扩展的铬磁模型中系统地研究了完全沉重的四夸克的质谱，其中包括颜色和铬磁相互作用。数值结果表明能量水平主要取决于颜色相互作用，从而有利于颜色 - 分解$ \ ket {（qq）^{6_ {c}}（\ bar {q} \ bar {q} \ bar {q}） $ \ ket {（qq）^{\ bar {3} _ {c}}}}（\ bar {q} \ bar {q}）^{3_ {c}}}} $一个。铬磁相互作用将两种颜色构型混合在一起，并产生较小的分裂。基态始终由颜色七文字配置主导。我们发现低于最低的重夸金对阈值以下没有稳定的状态。大多数州可能会宽阔，因为它们至少将一个$ S $波的衰减频道分为两个$ s $ - 波浪。一种可能的窄状态是$ 1^{+} $ $ $ bb \ bar {b} \ bar {c} $ state state state a质量$ 15719.1〜 \ text {mev} $。它在$η_{B} \ bar {B} _ {C} $ threshold上方。但是，由于角度的动量和奇偶元的保护，因此禁止此通道。
In this work, we systematically study the mass spectrum of the fully heavy tetraquark in an extended chromomagnetic model, which includes both color and chromomagnetic interactions. Numerical results indicate that the energy level is mainly determined by the color interaction, which favors the color-sextet $\ket{(QQ)^{6_{c}}(\bar{Q}\bar{Q})^{\bar{6}_{c}}}$ configuration over the color-triplet $\ket{(QQ)^{\bar{3}_{c}}(\bar{Q}\bar{Q})^{3_{c}}}$ one. The chromomagnetic interaction mixes the two color configurations and gives small splitting. The ground state is always dominated by the color-sextet configuration. We find no stable state below the lowest heavy quarkonium pair thresholds. Most states may be wide since they have at least one $S$-wave decay channel into two $S$-wave mesons. One possible narrow state is the $1^{+}$ $bb\bar{b}\bar{c}$ state with a mass $15719.1~\text{MeV}$. It is just above the $η_{b}\bar{B}_{c}$ threshold. But this channel is forbidden because of the conservation of the angular momentum and parity.
