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Revisiting the $\Omega(2012)$ as a hadronic molecule and its strong decays

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arxiv 2003.07588 v2 pith:BXAO67HZ submitted 2020-03-17 hep-ph hep-exnucl-exnucl-th

classification hep-phhep-exnucl-exnucl-th
keywords omegadecaywavebellebodycollaborationfractionsnewly
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Recently, the Belle collaboration measured the ratios of the branching fractions of the newly observed $\Omega(2012)$ excited state. They did not observe significant signals for the $\Omega(2012) \to \bar{K} \Xi^*(1530) \to \bar{K} \pi \Xi$ decay, and reported an upper limit for the ratio of the three body decay to the two body decay mode of $\Omega(2012) \to \bar{K} \Xi$. In this work, we revisit the newly observed $\Omega(2012)$ from the molecular perspective where this resonance appears to be a dynamically generated state with spin-parity $3/2^-$ from the coupled channels interactions of the $\bar{K} \Xi^*(1530)$ and $\eta \Omega$ in $s$-wave and $\bar{K} \Xi$ in $d$-wave. With the model parameters for the $d$-wave interaction, we show that the ratio of these decay fractions reported recently by the Belle collaboration can be easily accommodated.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Signatures of the $\Omega(2012)^{-}$ state in $\Xi^*\bar K$ Correlation Functions

    hep-ph 2026-03 accept novelty 6.5 of 10

    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.

  2. Probing the hadronic molecular nature of the $\Omega(2012)$, $\Omega(2380)$, and $\Omega_c(3120)$ via femtoscopy correlation functions

    hep-ph 2026-04 unverdicted novelty 5.0 of 10

    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).

  3. Probing the hadronic molecular nature of the $\Omega(2012)$, $\Omega(2380)$, and $\Omega_c(3120)$ via femtoscopy correlation functions

    hep-ph 2026-04 unverdicted novelty 5.0 of 10

    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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