Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model

Abstract

One of the celebrated tools in explaining the Hydrogen atom is Born-Oppenheimer approximation. The resemblance of $QQ\bar{q}\bar{q}$ tetraquarks to Hydrogen atom within Quantum chromodynamics (QCD) implies usage of Born-Oppenheimer approximation for these multiquark states. In this work, we use dynamical diquark model to calculate mass spectra and sizes of doubly charmed and charged tetraquark states denoted as $T_{cc}^{++}$. Our results for mass spectra indicate some bound state candidates with respect to corresponding two-meson thresholds. Calculation of expectation values of $\sqrt{⟨r^2⟩}$ reflects that doubly charmed and charged tetraquark states are compact.

8 pages, 6 tables, references added, numerical results revised, main conclusions unchanged, matches the accepted version of PRD

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Cited by in corpus (3)

• Doubly charmed hexaquarks in the diquark picture
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• Analysis of bound and resonant states of doubly heavy tetraquarks with spin $J\le 2$