Fully heavy dibaryons

Abstract

Abstract The existence of fully heavy dibaryons $$\varOmega _{ccc}\varOmega _{bbb}$$ Ω ccc Ω bbb , $$\varOmega _{ccb}\varOmega _{bbc}$$ Ω ccb Ω bbc , $$\varOmega _{ccc}\varOmega _{ccc}$$ Ω ccc Ω ccc , and $$\varOmega _{bbb}\varOmega _{bbb}$$ Ω bbb Ω bbb with $$J=0,~1,~2,~3$$ J = 0 , 1 , 2 , 3 and $$P=\pm 1$$ P = ± 1 are investigated in the framework of a constituent quark model with the help of the resonating group method. The dibaryon composed of six c or b quarks with $$J^{P}=0^{+}$$ J P = 0 + is able to be bound, because the requirement for antisymmetrization between the same baryon clusters introduces an attractive interaction between two fully heavy baryons. Although it is difficult for the dibaryon with the color-singlet type $$\varOmega _{ccc}\varOmega _{bbb}$$ Ω ccc Ω bbb to form any bound state, it is possible for the $$\varOmega _{ccb}\varOmega _{bbc}$$ Ω ccb Ω bbc state to be bound. The channel coupling of all channels of both $$\varOmega _{ccb}\varOmega _{bbc}$$ Ω ccb Ω bbc and $$\varOmega _{ccc}\varOmega _{bbb}$$ Ω ccc Ω bbb structures leads to the bound conclusion of this fully heavy system composed of three c quarks and three b quarks.