Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness
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arXiv
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| Natura: | Preprint |
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2025
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| author | Dhindsa, Navdeep Singh Mathur, Nilmani Padmanath, M. |
| author_facet | Dhindsa, Navdeep Singh Mathur, Nilmani Padmanath, M. |
| contents | We present the ground-state energy spectra of dibaryons composed of single-flavor quarks, specifically systems with strangeness $\mathcal{S} = -6$ and charm $\mathcal{C} = 6$. Our lattice QCD study is based on $N_f=2+1+1$ 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 $Ω_{ccc}$-$Ω_{ccc}$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10660 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness Dhindsa, Navdeep Singh Mathur, Nilmani Padmanath, M. High Energy Physics - Lattice High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory We present the ground-state energy spectra of dibaryons composed of single-flavor quarks, specifically systems with strangeness $\mathcal{S} = -6$ and charm $\mathcal{C} = 6$. Our lattice QCD study is based on $N_f=2+1+1$ 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 $Ω_{ccc}$-$Ω_{ccc}$ 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. |
| title | Lattice QCD Study of Positive Parity Dibaryons with Maximal Charm and Strangeness |
| topic | High Energy Physics - Lattice High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2507.10660 |