2023/07/04 by S. S. Agaev, Agaev, S. S., K. Azizi +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2307.01857
openalex publication_date 2023/07/04 · openalex created_date 2023/07/07 · openalex updated_date 2026/07/28
We explore the first radial excitation X4c∗ of the fully charmed diquark-antidiquark state X4c=cccc built of axial-vector components, and the hadronic molecule M =χc1χc1. The masses and current couplings of these scalar states are calculated in the context of the QCD two-point sum rule approach. The full widths of X4c∗ and M are evaluated by taking into account their kinematically allowed decay channels. We find partial widths of these processes using the strong couplings gi∗ and Gi(∗) at the X4c∗(M )-conventional mesons vertices computed by means of the QCD three-point sum rule method. The predictions obtained for the parameters m=(7235 ± 75)~ MeV, Γ=(144 ± 18)~MeV and \widetildem=(7180 ± 120)~MeV, \widetildeΓ=(169 ± 21)~MeV of these structures, are compared with the experimental data of the CMS and ATLAS Collaborations. In accordance to these results, within existing errors of measurements and uncertainties of the theoretical calculations, both the excited tetraquark and hadronic molecule may be considered as candidates to the resonance X(7300). Detailed analysis, however, demonstrates that the preferable model for X(7300) is an admixture of the molecule M and sizeable part of X4c∗.