Abstract
We show a way to unifiedly understand the origins of the repulsive core of baryon-baryon interaction and the universal repulsion of three-baryon interaction needed to avoid dramatic softening of the equation of state of neutron stars due to hyperon mixing. For this aim we adopt the string-junction model which embodies the essential aspects of the confinement in the baryon system confirmed by recent lattice QCD calculations. Key concept of this study lies in the recognition that baryonic short-range repulsion appears as the latent effect implying the energy necessary for full overlap of baryons, for the confinement to persist at such situation. Numerical results are shown and related problems are discussed.
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