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Observation of Ω(2012)^- to Xi(1530)bar{K} and measurement of the effective couplings of Ω(2012)^- to Xi(1530)bar{K} and Xibar{K}
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Observation of Ω(2012)^- to Xi(1530)bar{K} and measurement of the effective couplings of Ω(2012)^- to Xi(1530)bar{K} and Xibar{K}
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Using $\Upsilon(1S)$, $\Upsilon(2S)$, and $\Upsilon(3S)$ data collected by the Belle detector, we discover a new three-body decay, $\Omega(2012)^-\to\Xi(1530)\bar K\to\Xi\pi\bar K$, with a significance of 5.2~$\sigma$. The mass of the $\Omega(2012)^-$ is $(2012.5\pm0.7\pm0.5)$ MeV and its effective couplings to $\Xi(1530)\bar{K}$ and $\Xi\bar{K}$ are $(39^{+31}_{-39}\pm9)\times10^{-2}$ and $(1.7\pm0.3\pm0.3)\times10^{-2}$, where the first uncertainties are statistical and the second are systematic. The ratio of the branching fraction for the three-body decay to that for the two-body decay to $\Xi\bar{K}$ is $0.99\pm0.26\pm0.06$, assuming isospin symmetry.
Forward citations
Cited by 5 Pith papers
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Signatures of the $\Omega(2012)^{-}$ state in $\Xi^*\bar K$ Correlation Functions
Ω(2012) is dynamically generated as a Ξ*K–Ωη molecule; its pole produces pronounced near-threshold structures in the Ξ*0K− correlation function that can be measured at the LHC.
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Probing the hadronic molecular nature of the $\Omega(2012)$, $\Omega(2380)$, and $\Omega_c(3120)$ via femtoscopy correlation functions
Correlation function calculations with coupled-channel potentials produce low-momentum enhancements that the authors interpret as signatures of the molecular structure of Ω(2012), Ω(2380), and Ωc(3120).
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Probing the hadronic molecular nature of the $\Omega(2012)$, $\Omega(2380)$, and $\Omega_c(3120)$ via femtoscopy correlation functions
Numerical correlation functions computed from effective potentials exhibit enhancements that indicate the hadronic molecular nature of the Ω(2012), Ω(2380), and Ωc(3120) resonances.
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Experimental Advances on Light Baryon Spectroscopy at BESIII Experiment
BESIII reports discoveries of multiple new excited light baryon states from high-statistics data, expanding the known spectrum and supporting non-perturbative QCD studies.
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Experimental Advances on Light Baryon Spectroscopy at BESIII Experiment
BESIII reports discoveries of new excited nucleon, Lambda, Sigma, Xi, and Omega hyperon states from high-statistics electron-positron collision data.
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