Lattice Study of the $H$ Dibaryon

Abstract

The mass of the lowest spin-zero, strangeness-$(-2)$ flavor singlet state in the dibaryon sector has been calculated in quenched QCD on $16^3\times 32$ and $24^3\times 32$ 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 $100\text{MeV}$ above the $\Lambda \Lambda$ threshold.

Comments: LATTICE98(spectrum) 3 pages, 2 figures