Isospin Symmetry Violation in the Strong Decays of the Spin-2 Exotic State X2(4014)

The isospin violation in the strong decays of the spin-2 exotic charmonium-like state X₂(4014) has been studied within the framework of the covariant confined quark model. We have interpreted the exotic hadron X₂ as a four-quark state with a (D*D̄*) molecular-type interpolating quark current and computed the leading-order strong decay widths at the level of two-petal quark-loop diagrams. The partial widths of the decay modes into channels ω \,\,J / ω \,\,J Ψ . -0em Ψ and ρ ⁰J / J Ψ . -0em Ψ , and their branching ratio recently discussed in literature have been calculated and analyzed. In the comparison of our approach to the recent (D*D̄*) molecular scenarios, we have shown the explicit appearance of the threshold effect in the latter models. The calculated partial strong decay widths and their branching ratio are in reasonable agreement with the latest experimental data.