Univ Sci & Technol China, Dept Modern Phys, Hefei 230027, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
The cross section of the process <()over tilde>(o)<()over tilde>(o)-->gg is calculated in supersymmetry model of particle physics. By means of the obtained cross section value, the estimate of source spectrum for antiprotons produced by neutralino <()over tilde>(o) annihilation is given. We conclude that the observation of this spectrum in the low energy region offers a possible approach to find the dark matter and the supersymmetry particle.