Lattice Study of the H Dibaryon

The mass of the lowest spin-zero, strangeness-$(-2)$ flavor singlet state in the dibaryon sector has been calculated in quenched QCD on $16^3\times32$ and $24^3\times32$ lattices at $\beta=5.85$ to study whether the energy of the proposed $H$ dibaryon is near or below the $\Lambda\Lambda$ threshold. Preliminary results indicate that finite lattice volume artifacts overestimate the binding, and that on the largest lattice $m_H$ is of the order of $100\MeV$ above the $\Lambda\Lambda$ threshold.