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arXiv · 2208.02730

Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation

Luciano Maiani·Alessandro Pilloni·Antonio D. Polosa·Veronica Riquer
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Abstract

Tetraquarks QQq*q* are found to be described remarkably well with the Quantum Chromodynamics version of the Hydrogen bond, as treated with the Born-Oppenheimer approximation. We show the robustness of the method by computing the mass of the observed Tcc tetraquark following two different paths. Relying on this, we provide a prediction for the mass of the expected Tbb particle. The average sizes of tetraquarks are estimated to be approximately 3 - 5 GeV**-1. As a consequence hyperfine separations are not expected to be sizeable. We discussed possible reasons why LHCb has observed only one state in the DD* spectrum.

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Luciano Maiani, Alessandro Pilloni, Antonio D. Polosa, Veronica Riquer. 2022-08-04. Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation. https://doi.org/10.1016/j.physletb.2022.137624

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