Further evidence for an unstable H-dibaryon?

We present preliminary results for the mass of the 6q flavor-singlet state (J(P) = 0(+), S = -2) called H-dibaryon, calculated in quenched QCD on 16(3 )x30 and 24(3)x30 lattices with improved gauge and fermion actions (Symanzi k improvement, Clover action). For both lattice sizes we applied the fuzzin g technique to enhance the overlap with the ground state. We observe a H-ma ss above the Lambda Lambda-threshold for strong decay. The difference in ma ss, m(H) - 2m(Lambda), increases with increasing lattice size.