https://doi.org/10.1140/epja/s10050-024-01311-9
Regular Article –Theoretical Physics
Relativistic description of asymmetric fully heavy tetraquarks in the diquark–antidiquark model
1
Federal Research Center “Computer Science and Control”, Russian Academy of Sciences, Vavilov Street 40, 119333, Moscow, Russia
2
Faculty of Physics, M.V.Lomonosov Moscow State University, Leninskie Gory 1-2, 119991, Moscow, Russia
b
savchenko.em16@physics.msu.ru
Received:
15
January
2024
Accepted:
3
April
2024
Published online:
3
May
2024
Masses of the ground, orbitally and radially excited states of the asymmetric fully heavy tetraquarks, composed of charm (
) and bottom (
) quarks and antiquarks are calculated in the relativistic diquark–antidiquark picture. The relativistic quark model based on the quasipotential approach and quantum chromodynamics is used to construct the quasipotentials of the quark–quark and diquark–antidiquark interactions. These quasipotentials consist of the short-range one-gluon exchange and long-distance linear confinement interactions. Relativistic effects are consistently taken into account. A tetraquark is considered as a bound state of a diquark and an antidiquark which are treated as a spatially extended colored objects and interact as a whole. It is shown that most of the investigated tetraquarks states (including all ground states) lie above the fall-apart strong decay thresholds into a meson pair. As a result they could be observed as wide resonances. Nevertheless, several orbitally excited states lie slightly above or even below these fall-apart thresholds, thus they could be narrow states.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
