It is fairly well established that X(4260) does not correspond, regarding its mass and transition properties, to a conventional c-cbar state of the type provided for example by the Cornell  or the Godfrey-Isgur  models. This has motivated the development of other descriptions involving Fock space components (tetraquarks, meson molecules, hybrids...) different from c-cbar (see for example  and references therein).
Alternatively one may think of keeping a c-cbar description provided that the c-cbar static potential interaction includes the effect of other Fock components. This kind of decription has been developed for J⁺⁺ charmonium (as well as bottomonium) states through the so called Generalized Screened Potential Model (GSPM) . In this model the effective potential incorporates the effects of single S-wave meson-meson thresholds in the way suggested by lattice QCD calculations. This allows for a universal treatment of states below and above open flavor meson-meson thresholds.
Dealing with 1⁻⁻ states is more complicated due to the presence of many meson-meson component thresholds. In this work we explore the application of the GSPM to X(4260) and show that a consistent description of the mass as well as the transition properties is feasible.
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