Mass spectra of $$0^{--}$$ 0 - - and $$0^{+-}$$ 0 + - hidden-heavy baryoniums

Abstract

Abstract In this work, the spectra of the prospective exotic hidden-charm and hidden-bottom baryonium, viz. the baryon–antibaryon states, with $$J^{PC}=0^{--}$$ J PC = 0 - - and $$0^{+-}$$ 0 + - are investigated in the framework of QCD sum rules. The non-perturbative contributions up to dimension 12 are taken into account. Numerical results indicate that there might exist 3 possible $$0^{--}$$ 0 - - hidden-charm baryonium states with masses $$(5.22\pm 0.26)$$ ( 5.22 ± 0.26 ) , $$(5.52\pm 0.25)$$ ( 5.52 ± 0.25 ) , and $$(5.46\pm 0.24)$$ ( 5.46 ± 0.24 ) GeV, and 5 possible $$0^{+-}$$ 0 + - hidden-charm baryonium states with masses $$(4.76\pm 0.28)$$ ( 4.76 ± 0.28 ) , $$(5.24\pm 0.28)$$ ( 5.24 ± 0.28 ) , $$(5.16\pm 0.27)$$ ( 5.16 ± 0.27 ) , $$(5.52\pm 0.27)$$ ( 5.52 ± 0.27 ) , and $$(5.69\pm 0.27)$$ ( 5.69 ± 0.27 ) GeV, respectively. The corresponding hidden-bottom partners are found lying in the range of $$11.68-12.28$$ 11.68 - 12.28 GeV and $$11.38-12.33$$ 11.38 - 12.33 GeV, respectively. The possible baryonium decay modes are analyzed, which are hopefully measurable in LHC experiments.