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The observation of five    $$\varOmega _c $$    Ω  c= ssc states by LHCb [Aaij et al. Phys. Rev. Lett.  118 , 182001(2017)] and the confirmation of four of them by Belle [Yelton et al. Phys. Rev. D  97 , 051102(2018)], may represent an important milestone in our understanding of the quark organization inside hadrons. By providing results for the spectrum of    $$\varOmega _{ c}$$    Ω  cbaryons and predictions for their    $$\varXi _{ c}^{+}K^{-}$$Ξ   c   +    K  -and    $$\varXi _{ c}'^{+}K^{-}$$Ξ   c    ′  +K  -decay amplitudes within an harmonic oscillator based model, we suggest a possible solution to the    $$\varOmega _{c}$$    Ω  cquantum number puzzle and we extend our mass and decay width predictions to the    $$\varOmega _b$$    Ω  bstates. Finally, we discuss why the set of    $$\varOmega _{ c(b)}$$    Ω   c  (  b  )baryons is the most suitable environment to test the validity of three-quark and quark–diquark effective degrees of freedom.

The $$\varOmega _{ c}$$-puzzle solved by means of quark model predictions