Bound H-dibaryon from Full QCD Simulations on the Lattice

TL;DR

This study uses a novel lattice QCD method to explore the existence of the H-dibaryon in a flavor SU(3) symmetric setting, finding it to be a bound state with measurable binding energy.

Contribution

It introduces a new approach to study hadron interactions in lattice QCD and demonstrates the H-dibaryon as a bound state in this framework.

Findings

H-dibaryon is a bound state with 20-50 MeV binding energy.

The method derives potentials from the Nambu-Bethe-Salpeter wave function.

Results are obtained for pseudo-scalar meson masses between 469 and 1171 MeV.

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.