; Li, L.
; Ning, P. Z.] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
; [Zhong, X. H.] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
The properties of Sigma-hyperons in pure Sigma matter are studied with the finite-density quantum chromodynamics sum rule (QCDSR) approach. The Sigma Sigma nuclear potential U(Sigma) is most likely strongly attractive, it could be about -50 MeV or even more attractive at normal nuclear density. If this prediction is the case, the interactions between Sigma-hyperons should play crucial roles in the strange nuclear matter, when there are multi-Sigma hyperons. The bound state of the double-Sigma may exist.