2018/07/18 by Long-Cheng Gui, Long-Sheng Lu, Qi-Fang Lü +3 · 5 citations
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research
paper · pdf · doi:10.1103/physrevd.98.016010
The open-charm strong decays of higher charmonium states up to the mass of the 6P multiplet are systematically studied in the 3P0 model. The wave functions of the initial charmonium states are calculated in the linear potential and screened potential quark models. The decay widths for most of the well-established charmonium states above the open-charm thresholds can be reasonably described. By comparing our quark model calculations with the experimental observations we also discuss the nature of some of the newly observed charmonium-like states. It is found that (i) the \ensuremathψ(4415) may favor the \ensuremathψ(4S) or \ensuremathψ1(3D) assignment. There may exist two highly overlapping vector charmonium states around 4.4 GeV; (ii) in the LP model the JPC=1^\ensuremath-\ensuremath- Y(4660) resonance and the JPC=0++ X(4500) resonance may be assigned as the \ensuremathψ(5S) and \ensuremathχc0(4P), respectively; (iii) the newly observed state X*(3860) can be assigned as the \ensuremathχc0(2P) state with a narrow width of about 30 MeV; (iv) it seems to be difficult to accommodate the X(4140) and X(4274) states in the same potential model as excited \ensuremathχc1 states; (v) the X(3940) resonance can be assigned as the \ensuremathηc(3S) state; (vi) the vector charmonium-like states Y(4230/4260,4360) and scalar X(4700) cannot be described by any conventional charmonium states self-consistently in our model.