We present the ground-state energy spectra of dibaryons composed of single-flavor quarks, specifically systems with strangeness S=−6 and charm C=6. Our lattice QCD study is based on Nf=2+1+1 MILC ensembles with highly improved staggered quark sea quarks, spanning four lattice spacings and two spatial volumes. We employ valence quark propagators realized using a relativistic overlap action, evaluate correlation matrices with carefully designed operator bases, and extract reliable ground-state energy estimates in the S=0 and S=2 spin channels. We explore their binding characteristics and interaction dynamics by examining the energy separation between the dibaryon states and the corresponding two-baryon thresholds. These results contribute to a deeper understanding of single-flavor dibaryon states as a function of the quark masses. In the S=0 channel, the Ωccc−Ωccc system exhibits a clear signal of a bound state, while the Ω−Ω system lies very close to the threshold, making it difficult to draw definitive conclusions. For S=2, both systems are found to be unbound.
Dhindsa et al. (Tue,) studied this question.