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arXiv 2401.04798hep-phhep-exhep-lat
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矢量双粲四夸克态的电磁性质

Electromagnetic properties of vector doubly charmed tetraquark states

U. Özdem, K. Azizi

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AI总结：

本文利用光锥QCD求和规则在双夸克-反双夸克图像下计算多种双粲矢量四夸克态的磁偶极矩，并讨论U对称性破缺，为确定这些态的真实结构提供依据。

摘要：

我们对内部结构尚未确定的多夸克系统开展电磁性质的系统研究。受近期观测到 $T_{cc}^+$ 态的启发，我们应用光锥版本QCD求和规则方法提取若干可能的双粲矢量四夸克态的磁偶极矩。在分析这些态的磁偶极矩时，将它们建模为具有双夸克-反双夸克组态。成员态的磁偶极矩提取结果分别为 $ μ_{T_{cc \ar{u} \ar{d}}} = 1.17^{+0.44}_{-0.32} \, μ_N$、$ μ_{T_{cc \ar{u} \ar{s}}} = 1.35^{+0.50}_{-0.37} \, μ_N$、$ μ_{T_{cc \ar{d} \ar{s}}} = -2.69^{+1.02}_{-0.75} \, μ_N$、$ μ_{T_{cc \ar{u} \ar{u}}} = 1.33^{+0.56}_{-0.40} \, μ_N$、$ μ_{T_{cc \ar{d} \ar{d}}} = 1.41^{+0.57}_{-0.43} \, μ_N$ 和 $ μ_{T_{cc \ar{s} \ar{s}}} = 1.44^{+0.53}_{-0.41} \, μ_N$。将 $T_{cc \ar{u} \ar{d}}$ 态与 $T_{cc \ar{u} \ar{s}}$ 态的磁偶极矩结果进行比较，可以看出 $U$-对称性被破坏约 $\%15$，而对于 $T_{cc \ar{d} \ar{d}}$ 和 $T_{cc \ar{s} \ar{s}}$ 态，该对称性仅被轻微破坏。所得结果可能有助于确定这些新有趣态的真实本质。

英文摘要：

We conduct a systematic study of the electromagnetic properties of multiquark systems with undetermined internal structures. Motivated by the recent observation of the $T_{cc}^+$ state, we apply the light-cone version of the QCD sum rule method to extract the magnetic dipole moments of several possible doubly-charmed vector tetraquark states. When analyzing the magnetic dipole moment of these states, they are modeled to have the diquark-antidiquark configurations. The magnetic dipole moments for the members are extracted as $ μ_{T_{cc \bar{u} \bar{d}}} = 1.17^{+0.44}_{-0.32} \, μ_N$, $ μ_{T_{cc \bar{u} \bar{s}}} = 1.35^{+0.50}_{-0.37} \, μ_N$, $ μ_{T_{cc \bar{d} \bar{s}}} = -2.69^{+1.02}_{-0.75} \, μ_N$, $ μ_{T_{cc \bar{u} \bar{u}}} = 1.33^{+0.56}_{-0.40} \, μ_N$, $ μ_{T_{cc \bar{d} \bar{d}}} = 1.41^{+0.57}_{-0.43} \, μ_N$ and $ μ_{T_{cc \bar{s} \bar{s}}} = 1.44^{+0.53}_{-0.41} \, μ_N$. Comparing the results obtained for the magnetic dipole moments of the $T_{cc \bar{u} \bar{d}}$ state with the $T_{cc \bar{u} \bar{s}}$ state, the $U$-symmetry is seen to be broken at about $\%15$, while for the $T_{cc \bar{d} \bar{d}}$ and $T_{cc \bar{s} \bar{s}}$ states, this symmetry is minimally broken. The obtained results may be useful to determine the true nature of these new interesting states.

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