arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2404.12409hep-phnucl-th
收藏

精确统一四夸克方程

Exact unified tetraquark equations

B. Blankleider, A. N. Kvinikhidze

AI总结:

本文扩展了四夸克协变方程至精确情形,显式包含 $q\bar q$ 湮灭,并通过单一势 $\Delta$ 纳入所有先前忽略的项,统一了不同四夸克模型。

摘要:

最近我们提出了描述四夸克的协变方程,该方程以两体态 $D\bar D$(双夸克-反双夸克)、$MM$(介子-介子)以及三体类态的混合形式表示,其中两个夸克为旁观者,另外两个夸克相互作用 [Phys. Rev. D 107, 094014 (2023)]。这些方程的一个特点是统一了对看似无关的四夸克模型的描述,例如莫斯科组的 $D\bar D$ 模型 [Faustov et al., Universe 7, 94 (2021)] 和吉森组的耦合道 $D\bar D-MM$ 模型 [Heupel et al., Phys. Lett. B718, 545 (2012)]。这里我们将这些方程扩展到精确情形,其中显式包含 $q\bar q$ 湮灭,并且所有先前忽略的项(三体力、两夸克 t 矩阵的非极点贡献等)通过包含单个 $q\bar q$ 势 $\Delta$ 而纳入考虑。

英文摘要:

Recently we formulated 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 where two of the quarks are spectators while the other two are interacting [Phys. Rev. D 107, 094014 (2023)]. A feature of these equations is that they unify descriptions of 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)]. Here we extend these equations to the exact case where $q\bar{q}$ annihilation is incorporated explicitly, and all previously neglected terms (three-body forces, non-pole contributions to two-quark t matrices, etc.) are taken into account through the inclusion of a single $q\bar{q}$ potential $Δ$.

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。

↑