2017/06/30 by S. S. Agaev, K. Azizi, H. Sundu · 1 citation
Physics and Astronomy · #hep-ph #hep-ex #hep-lat
paper · pdf · doi:10.1103/physrevd.96.034026
published as Phys. Rev. D 96, 034026 (2017) · 12 Pages, 3 Figures and 5 Tables
arxiv created 2017/08/30 · arxiv updated 2017/09/06
Exploration of the resonances Zc(3900) and Z(4430) are performed by assuming that they are ground-state and first radial excitation of the same tetraquark with JP=1+. The mass and current coupling of the Zc(3900) and Z(4430) states are calculated using QCD two-point sum rule method by taking into account vacuum condensates up to eight dimensions. We investigate the vertices ZcMhMl and ZMhMl, with Mh and Ml being the heavy and light mesons, and evaluate the strong couplings gZcMhMl and gZMhMl using QCD sum rule on the light cone. The extracted couplings allow us to find the partial width of the decays Zc(3900) → J/ψπ; ψ′ π; ηc ρ and Z(4430) → ψ′ π; J/ψπ; ηc′ρ; ηcρ, which may help in comprehensive investigation of these resonances. We compare width of the decays of Zc(3900) and Z(4430) resonances with available experimental data as well as existing theoretical predictions.