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arXiv · 2507.06682

Structure of the $\Omega^{-}(2012)$ with Hamiltonian Effective Field Theory

Fang-Chao Han·Zhan-Wei Liu·Derek B. Leinweber·Anthony W. Thomas
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Abstract

We investigate the internal structure of the $\Omega(2012)^-$ by analyzing lattice QCD simulation and experimental data within Hamiltonian effective field theory, considering both $J^P = 1/2^-$ and $3/2^-$ assignments. The couplings to the dominant decay channel $\Xi \bar{K}$ and the near-threshold channel $\Xi(1530) \bar{K}$ are determined through the quark-pair-creation model. By studying the lattice QCD spectra in these two spin-parity scenarios, we extract the masses and widths of the resonances. We notice that the $J^P = 3/2^-$ resonance is consistent with the observed $\Omega(2012)^-$ while the recently reported $\Omega(2109)^-$ may be a $J^P = 1/2^-$ $\Omega$.

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Fang-Chao Han, Zhan-Wei Liu, Derek B. Leinweber, Anthony W. Thomas. 2025-07-09. Structure of the $\Omega^{-}(2012)$ with Hamiltonian Effective Field Theory. https://doi.org/10.1103/xdbd-v5hb

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