2025/07/14 by Dhindsa, Navdeep Singh, Mathur, Nilmani, Padmanath, M. · 2 citations
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.2507.10660
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 (HISQ) 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.