CERN Accelerating science

Article
Report number	arXiv:2208.02730
Title	Doubly Heavy Tetraquarks in the Born-Oppenheimer approximation
Author(s)	Maiani, Luciano (Rome U. ; INFN, Rome ; CERN) ; Pilloni, Alessandro (Messina U. ; INFN, Catania) ; Polosa, Antonio D. (Rome U. ; INFN, Rome) ; Riquer, Veronica (Rome U. ; INFN, Rome ; CERN)
Publication	2023-01-10
Imprint	2022-08-04
Number of pages	8
Note	8 pages, 1 figure. Corrections made. Improved draft. To appear in PLB
In:	Phys. Lett. B 836 (2023) 137624
DOI	10.1016/j.physletb.2022.137624 (publication)
Subject category	hep-ph ; Particle Physics - Phenomenology
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.
Copyright/License	preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2022-2024 The Authors (License: CC BY 4.0), sponsored by SCOAP³

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