2024/12/20 by S. S. Agaev, K. Azizi, Agaev, S. S. +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear physics research studies #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2412.16068
openalex publication_date 2024/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The scalar tetraquarks Tb and Tc with asymmetric contents bb bc and cc cb are explored using the QCD sum rule method. These states are modeled as the diquark-antidiquarks composed of the axial-vector components. The masses and current couplings of Tb and Tc are calculated using the two-point sum rule approach. The predictions obtained for the masses of these four-quark mesons prove that they are unstable against the strong two-meson fall-apart decays to conventional mesons. In the case of the tetraquark Tb this is the decay Tb→ ηbBc-. The processes Tc→ ηcBc+ and J/ψBc∗ + are kinematically allowed decay modes of the tetraquark Tc. The widths of corresponding processes are evaluated by employing the QCD three-point sum rule approach which are necessary to estimate strong couplings at the tetraquark-meson-meson vertices of interest. The mass m=(15698 ± 95)~MeV and width Γ[Tb]=(36.0 ± 10.4)~ MeV of the tetraquark Tb as well as the parameters \widetildem=(9680 ± 102)~MeV and Γ[Tc]=(54.7 ± 12.6)~ MeV in the case of Tc provide useful information to search for and interpret new exotic states.