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| Format: | Preprint |
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2024
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| Online Access: | https://arxiv.org/abs/2410.08519 |
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| _version_ | 1866913678299758592 |
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| author | Junnarkar, Parikshit M. Mathur, Nilmani |
| author_facet | Junnarkar, Parikshit M. Mathur, Nilmani |
| contents | We present the ground state energy spectra of two-flavored heavy dibaryons in the spin-singlet channel. In particular, the ground state masses of $Ω_{llQ}Ω_{llQ}, Ω_{QlQ}Ω_{llQ}$ and $Ω_{QlQ}Ω_{QlQ}$ states are computed and compared with their respective lowest non-interacting energy levels, where the flavor $Q \in (c,b)$ denotes charm and bottom quarks, and the other flavor $l \in {s,c,b}$ represents strange, charm and bottom, respectively. Considering their valence quark structures, these hadrons could be thought of as the heavy flavor analogues of spin-singlet nucleon-nucleon states. The gauge configurations employed in this study are HISQ ensembles with $N_f = 2+1+1$ flavors, generated by the MILC collaboration, at four lattice spacings, namely $a=0.1207, 0.0888, 0.0582$ and $0.0448$ fm. The aforementioned states are also computed at different quark masses, between $m_s \le m_l \le m_b$, including at unphysical heavy quark masses, to explore the quark mass dependence of any possible binding. For the dibaryon states $Ω_{bbc}Ω_{bbc}, Ω_{ccb}Ω_{ccb}$ and $Ω_{ccb} Ω_{bbc}$, we find a clear evidence of an energy level below their respective non-interacting energy levels. In addition, for these dibaryons at quark masses $m_c < m_l \le m_b$, a trend is found where the gap, between the lowest energy levels and the respective lowest non-interacting levels, increases as the quark mass $m_l$ increases. We also study the heavy quark spin-symmetry and its breaking for these heavy dibaryons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08519 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectrum of two-flavored spin-zero heavy dibaryons in lattice QCD Junnarkar, Parikshit M. Mathur, Nilmani High Energy Physics - Lattice High Energy Physics - Phenomenology We present the ground state energy spectra of two-flavored heavy dibaryons in the spin-singlet channel. In particular, the ground state masses of $Ω_{llQ}Ω_{llQ}, Ω_{QlQ}Ω_{llQ}$ and $Ω_{QlQ}Ω_{QlQ}$ states are computed and compared with their respective lowest non-interacting energy levels, where the flavor $Q \in (c,b)$ denotes charm and bottom quarks, and the other flavor $l \in {s,c,b}$ represents strange, charm and bottom, respectively. Considering their valence quark structures, these hadrons could be thought of as the heavy flavor analogues of spin-singlet nucleon-nucleon states. The gauge configurations employed in this study are HISQ ensembles with $N_f = 2+1+1$ flavors, generated by the MILC collaboration, at four lattice spacings, namely $a=0.1207, 0.0888, 0.0582$ and $0.0448$ fm. The aforementioned states are also computed at different quark masses, between $m_s \le m_l \le m_b$, including at unphysical heavy quark masses, to explore the quark mass dependence of any possible binding. For the dibaryon states $Ω_{bbc}Ω_{bbc}, Ω_{ccb}Ω_{ccb}$ and $Ω_{ccb} Ω_{bbc}$, we find a clear evidence of an energy level below their respective non-interacting energy levels. In addition, for these dibaryons at quark masses $m_c < m_l \le m_b$, a trend is found where the gap, between the lowest energy levels and the respective lowest non-interacting levels, increases as the quark mass $m_l$ increases. We also study the heavy quark spin-symmetry and its breaking for these heavy dibaryons. |
| title | Spectrum of two-flavored spin-zero heavy dibaryons in lattice QCD |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.08519 |