Bound H-dibaryon from Full QCD Simulations on the Lattice

Abstract

Using a new method recently proposed by the HAL QCD collaboration to study hadron interactions in lattice QCD, we investigate a possibility for an existence of the H-dibaryon in the flavor SU(3) symmetric world. A potential for the flavor-singlet baryon-baryon channel is derived from the Nambu-Bethe-Salpeter wave function, and the elusive H-dibaryon is shown to be a bound state, with the binding energy of 20--50 MeV for the pseudo-scalar meson masses in the range that 469--1171 MeV.