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Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation

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arxiv 2208.02730 v2 pith:WRK4MT2K submitted 2022-08-04 hep-ph

Luciano Maiani , Alessandro Pilloni , Antonio D. Polosa , Veronica Riquer This is my paper
classification hep-ph
keywords tetraquarksapproximationborn-oppenheimerexpectedmassobservedapproximatelyaverage
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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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Electromagnetic form factors and structure of the $T_{bb}$ tetraquark from lattice QCD

    hep-lat 2025-10 unverdicted novelty 8.0 of 10

    Lattice QCD on one ensemble yields electromagnetic form factors for T_bb, indicating a compact heavy diquark plus light antidiquark bound state with charge radius smaller than the BB* threshold.

  2. A New Look at the X Compositeness from its Lineshape

    hep-ph 2026-05 unverdicted novelty 5.0 of 10

    An auxiliary-field effective theory yields a lineshape parametrization for molecular X(3872) that consistently describes deuteron scattering data and differs from the Flatté form used for compact interpretations.

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