The $\hat{I}\pounds \hat{I}\pounds$ interactions in finite-density QCD sum rules

Abstract

The properties of $\hat{I}\pounds$-hyperons in pure $\hat{I}\pounds$ matter are studied with the finite-density quantum chromo-dynamics sum rule (QCDSR) approach. The $\hat{I}\pounds \hat{I}\pounds$ nuclear potential $U_{\hat{I}}\pounds$ 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 $\hat{I}\pounds$-hyperons should play crucial roles in the strange nuclear matter, when there are multi-$\hat{I}\pounds$ hyperons. The bound state of double-$\hat{I}\pounds$ maybe exist.

Latex, 9 pages with 10 figures