2024/10/29 by S. S. Agaev, K. Azizi, Agaev, S. S. +3
Physics and Astronomy · Chemistry · #Quantum, superfluid, helium dynamics #Black Holes and Theoretical Physics #Advanced NMR Techniques and Applications
paper · pdf · doi:10.48550/arxiv.2410.22439
Spectroscopic parameters and decays of the exotic tensor meson T with content bc bc are explored in the context of the diquark-antidiquark model. We treat it as a state built of axial-vector diquark bTCγμc and antidiquark bγνC cT, where C is the charge conjugation matrix. The mass m and current coupling Λ of this tetraquark are extracted from two-point sum rules. Our result for m=(12.70 ± 0.09)~GeV proves that T is unstable against strong dissociations to two-meson final states. Its dominant decay channels are processes T → J/ψΥ, ηbηc, and Bc(∗) +Bc(∗) -. Kinematically allowed transformations of T include also decays T→ D(∗ )+D(∗ )- and D(∗ )0D(∗ )0, which are generated by bb annihilation inside of T. The full width of T is estimated by considering all of these channels. Their partial widths are calculated by invoking methods of three-point sum rule approach which are required to evaluate strong couplings at corresponding tetraquark-meson-meson vertices. Our predictions for the mass and width ΓT=(117.4 ± 15.9)~ MeV of the tensor state T provide useful information for experimental studies of fully heavy four-quark exotic structures.