The glueball content of ?

We carry out the first lattice QCD derivation of mixing energy and angle pseudoscalar charmonium glueball on two gauge ensembles with Nf=2 degenerate dynamical charm quarks. The is determined to be 49(6) MeV near physical ensemble, which seems insensitive quark mass. By assumption that X(2370) predominantly a glueball, approximately 4.6(6)?, results in +3.9(9) mass shift ground state charmonium. In mean time, can raise total width by 7.2(8) MeV, explains some extent relative large ?c meson. As result, branching fraction ?c??? understood this cc¯-glueball framework. On other hand, possible discrepancy theoretical predictions experimental partial J/????c cannot alleviated picture yet, demands future precise measurements width.