The masses of the recently reported by LHCb two pentaquark charmonium states $P_{ c}^{ *}(4380)$ and $P_{ c}^{ *}(4450)$ which are supposed to have the configuration $(uudc\overline{ c})$ have been estimated in the framework of the quasiparticle model of diquarks considering $[ud][uc]\overline{ c}$ configuration. The masses are reproduced very well which indicates that the description of diquark as quasiparticle is very useful for describing multiquark state and to understand the dynamics of it.
Categories: hep-ph