https://doi.org/10.1140/epjp/s13360-023-04562-5
Regular Article
Hadronic molecules 
and 
1
Institute for Physical Problems, Baku State University, Az–1148, Baku, Azerbaijan
2
Department of Physics, University of Tehran, North Karegar Avenue, 14395-547, Tehran, Iran
3
Department of Physics, Doǧuş University, Dudullu-Ümraniye, 34775, Istanbul, Turkey
4
Division of Optometry, School of Medical Services and Techniques, Doǧuş University, 34775, Istanbul, Turkey
5
Department of Physics Engineering, Istanbul Medeniyet University, 34700, Istanbul, Turkey
Received:
19
July
2023
Accepted:
5
October
2023
Published online:
21
October
2023
The fully charmed hadronic scalar molecules 
and 
are studied in the context of the QCD sum rule method. The masses m, 
and current couplings f, 
of these states are calculated using the two-point sum rule approach. The obtained results 
and 
are employed to determine their decay channels. It is demonstrated that the processes 
and 
are kinematically allowed decay modes of 
. The molecule 
decays to 
, 
, 
, 
, 
, and 
mesons. The partial widths of all these processes are evaluated by means of the three-point sum rule calculations, which are necessary to extract the strong couplings 
at vertices 
, 
, and others. Our estimates for the full widths of the molecules 
and 
, as well as their masses are compared with parameters of the X resonances discovered by the LHCb-ATLAS-CMS Collaborations in the di-
and invariant mass distributions. We argue that the molecule can be considered as a real candidate to the resonance X(6200). The structure may be interpreted as X(6900) or one of its components in combination with a scalar tetraquark.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. 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.
