${\mathrm{\Omega }}_c$ excited states within a ${\mathrm{S}\mathrm{U}(6)}_{\mathrm{l}\mathrm{s}\mathrm{f}}\times$HQSS model

We have reviewed the renormalization procedure used in the unitarized coupled-channel model of Phys. Rev. D85 114032 (2012), and its impact in the $C=1$, $S=-2$, and $I=0$ sector, where five ${\mathrm{\Omega }}_c^{(\ast )}$ states have been recently observed by the LHCb Collaboration. The meson-baryon interactions used in the model are consistent with both chiral and heavy-quark spin symmetries and lead to a successful description of the observed lowest-lying odd parity resonances ${\mathrm{\Lambda }}_c(2595)$ and ${\mathrm{\Lambda }}_c(2625)$, and ${\mathrm{\Lambda }}_b(5912)$ and ${\mathrm{\Lambda }}_b(5920)$ resonances. We show that some (probably at least three) of the states observed by LHCb will also have odd parity and spins $J=1\mathrm{/}2$ and $J=3\mathrm{/}2$, belonging two of them to the same ${\rm SU(6)}_{\rm light-spin-flavor}\times$HQSS multiplets that the latter strangenessless heavy$-\mathrm{\Lambda }$ baryons.