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- W4378512410 abstract "We derive covariant equations describing the tetraquark in terms of an admixture of two-body states $Dbar D$ (diquark-antidiquark), $MM$ (meson-meson), and three-body-like states $qbar q (T_{qbar q})$, $q q (T_{bar qbar q})$, and $bar qbar q (T_{qq})$ where two of the quarks are spectators while the other two are interacting (their t matrices denoted correspondingly as $T_{qbar q}$, $T_{bar qbar q}$, and $T_{qq}$). This has been achieved by describing the $qqbar qbar q$ 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 $Dbar D$ 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)]." @default.
- W4378512410 created "2023-05-27" @default.
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- W4378512410 date "2023-05-11" @default.
- W4378512410 modified "2023-10-18" @default.
- W4378512410 title "Unified tetraquark equations" @default.
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- W4378512410 doi "https://doi.org/10.1103/physrevd.107.094014" @default.
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