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 3–5GeV−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.
Doubly heavy tetraquarks in the Born-Oppenheimer approximation / Maiani, Luciano; Pilloni, Alessandro; Polosa, Antonio D.; Riquer, Veronica. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 836:(2023). [10.1016/j.physletb.2022.137624]
Doubly heavy tetraquarks in the Born-Oppenheimer approximation
Luciano Maiani;Alessandro Pilloni;Antonio D. Polosa
;Veronica Riquer
2023
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 3–5GeV−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.| File | Dimensione | Formato | |
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