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arXiv 2302.11542hep-phnucl-th
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统一的四夸克态方程

Unified tetraquark equations

A. N. Kvinikhidze, B. Blankleider

AI总结:

本文推导了协变的统一四夸克态方程,通过保留所有两体相互作用的类 Faddeev 四体方程,将双夸克-反双夸克、介子-介子及类三体态混合,统一了先前看似不相关的四夸克态模型。

摘要:

我们推导了协变方程,用两体态 $D\ar D$(双夸克-反双夸克)、$MM$(介子-介子)以及类三体态 $q\ar q (T_{q\ar q})$、$q q (T_{\ar q\ar q})$ 和 $\ar q\ar q (T_{qq})$ 的混合来描述四夸克态,其中两个夸克是旁观者,而另外两个发生相互作用(它们的 t 矩阵相应地记为 $T_{q\ar q}$、$T_{\ar q\ar q}$ 和 $T_{qq}$)。这是通过使用 Khvedelidze 和 Kvinikhidze [Theor. Math. Phys. 90, 62 (1992)] 的类 Faddeev 四体方程描述 $qq\ar q\ar q$ 系统实现的,同时保留了所有的两体相互作用(与先前忽略涉及孤立两夸克散射项的工作不同)。因此,我们的表述能够统一看似不相关的四夸克态模型,例如 Moscow 小组 [Faustov et al., Universe 7, 94 (2021)] 的 $D\ar D$ 模型和 Giessen 小组 [Heupel et al., Phys. Lett. B718, 545 (2012)] 的耦合通道 $D \ar D-MM$ 模型。

英文摘要:

We derive covariant equations describing the tetraquark in terms of an admixture of two-body states $D\bar D$ (diquark-antidiquark), $MM$ (meson-meson), and three-body-like states $q\bar q (T_{q\bar q})$, $q q (T_{\bar q\bar q})$, and $\bar q\bar q (T_{qq})$ where two of the quarks are spectators while the other two are interacting (their t matrices denoted correspondingly as $T_{q\bar q}$, $T_{\bar q\bar q}$, and $T_{qq}$). This has been achieved by describing the $qq\bar q\bar q$ system using the Faddeev-like four-body equations of Khvedelidze and Kvinikhidze [Theor. Math. Phys. 90, 62 (1992)] while retaining all two-body interactions (in contrast to previous works where terms involving isolated two-quark scattering were neglected). As such, our formulation, is able to unify seemingly unrelated models of the tetraquark, like, for example, the $D\bar D$ model of the Moscow group [Faustov et al., Universe 7, 94 (2021)] and the coupled channel $D \bar D-MM$ model of the Giessen group [Heupel et al., Phys. Lett. B718, 545 (2012)].

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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