2025/04/03 by S. S. Agaev, K. Azizi, Agaev, S. S. +3
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2504.03003
The mass and current coupling of the tensor hybrid charmonia Hc and \widetildeHc with quantum numbers JPC =2-+ and 2++, as well as their full widths are calculated in the context of the QCD sum rule method. The spectral parameters of these states are computed using the QCD two-point sum rule approach including dimension-12 terms ∼ ⟨ gs3G3⟩ 2 . The full decay widths of the charmonia Hc and \widetildeHc are evaluated by considering their kinematically allowed decay channels. In the case of the hybrid state Hc decays to D(± )D∗ (∓ ), D0 D∗ 0, and Ds(± )Ds∗ (∓ ) mesons are taken into account. The processes \widetildeHc → D(∗)+D(∗ )-, D(∗) 0D(∗) 0, and Ds(∗)+Ds(∗) - are employed to estimate the full width of the hybrid charmonium \widetildeHc. The partial widths of these decays are computed by means of the QCD three-point sum rule method which is necessary to calculate strong couplings at the relevant hybrid-meson-meson vertices. Our predictions m=(4.16± 0.14)~GeV , and \widetildem=(4.5± 0.1)~GeV for the masses and Γ[ Hc] =(160± 30)~MeV, and Γ[ \widetildeH c] =(206± 33)~MeV for the full width of these hybrid charmonia can be useful to study and interpret various resonances in the 4-5~GeV mass range.