Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
; China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
; Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
The structure of the Delta Delta dibaryon is studied in terms of the chiral SU(3) quark model. The ground state energy of Delta Delta dibaryon is evaluated by considering both the Delta Delta and CC (hidden color) channels. The parameter-dependence of the Delta Delta dibaryon mass is also investigated. It is shown that the resultant mass of the Delta Delta dibaryon is lower than the threshold of the Delta Delta channel but still higher than that of the Delta N pi channel. [S0556-2813(99)00410-0].