Eur. Phys. J. C (2022) 82: 805
https://doi.org/10.1140/epjc/s10052-022-10749-4

Regular Article - Theoretical Physics

Fully heavy dibaryons

¹ Department of Physics, Nanjing Normal University, 210023, Nanjing, People’s Republic of China
² Department of Physics, Yangzhou University, 225009, Yangzhou, People’s Republic of China
³ Department of Physics, Nanjing University, 210093, Nanjing, People’s Republic of China

^a hxhuang@njnu.edu.cn
^b jlping@njnu.edu.cn

Received: 27 October 2021
Accepted: 23 August 2022
Published online: 8 September 2022

Abstract

The existence of fully heavy dibaryons ${\Omega }_{\mathit{ccc}}{\Omega }_{\mathit{bbb}}$, ${\Omega }_{\mathit{ccb}}{\Omega }_{\mathit{bbc}}$, ${\Omega }_{\mathit{ccc}}{\Omega }_{\mathit{ccc}}$, and ${\Omega }_{\mathit{bbb}}{\Omega }_{\mathit{bbb}}$ with $J=0,1,2,3$ and $P=\pm 1$ 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 $J^P=0^{+}$ 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 ${\Omega }_{\mathit{ccc}}{\Omega }_{\mathit{bbb}}$ to form any bound state, it is possible for the ${\Omega }_{\mathit{ccb}}{\Omega }_{\mathit{bbc}}$ state to be bound. The channel coupling of all channels of both ${\Omega }_{\mathit{ccb}}{\Omega }_{\mathit{bbc}}$ and ${\Omega }_{\mathit{ccc}}{\Omega }_{\mathit{bbb}}$ structures leads to the bound conclusion of this fully heavy system composed of three c quarks and three b quarks.