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arXiv · 2409.19843

Investigation on the $\Omega(2012)$ from QCD sum rules

Niu Su·Hua-Xing Chen·Philipp Gubler·Atsushi Hosaka
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Abstract

We investigate the recently observed $\Omega(2012)$ baryon using QCD sum rules. By constructing $P$-wave $\Omega$ baryon currents and performing spin projection and parity projection, we obtain the masses of the $J^P = 1/2^-$ and $3/2^-$ states as $M_{1/2^-} = 2.07^{+0.07}_{-0.07}{\rm~GeV}$ and $M_{3/2^-} = 2.05^{+0.09}_{-0.10}{\rm~GeV}$ in good agreement with experiment. This suggests that $\Omega(2012)$ is likely to be a negative parity $P$-wave excited state, though its spin remains undetermined and requires further study of its decay properties.

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Niu Su, Hua-Xing Chen, Philipp Gubler, Atsushi Hosaka. 2024-09-30. Investigation on the $\Omega(2012)$ from QCD sum rules. https://doi.org/10.1016/j.nuclphysbps.2024.09.006

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