A holographic model predicts double-heavy tetraquarks as Efimov-like bound states of a heavy meson and a sphaleron in the Sakai-Sugimoto model.
The inertial parameters are mk=1 = 16 π 2aNc, ω 2 k=1 = 1 6
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Holographic tetraquarks and the newly observed $T_{cc}^{+}$ at LHCb
A holographic model predicts double-heavy tetraquarks as Efimov-like bound states of a heavy meson and a sphaleron in the Sakai-Sugimoto model.