$3000$ MeV to about $3120$ MeV. Hence we restrict our space of meson-baryon states up to the $\Omega_c\, \omega$ with mass $3478$ MeV. Yet, the diagonal matrix element in this channel is zero and we can also eliminate it. The energy ranged by the channels chosen widely covers the range of energies of Ref. [@lhcbexp] and it is a sufficiently general basis of states. We show in Tables \[tab1\] and \[tab2\] these states together with their threshold masses.

    [**States**]{}        $\Xi_c\bar{K}$     $\Xi^{\prime}_c\bar{K}$     $\Xi D$     $\Omega_c \eta$       $\Xi D^*$      $\Xi_c \bar{K}^*$      $\Xi^{\prime}_c\bar{K}^*$
  --------------------- ------------------ --------------------------- ----------- -------------------- --------------- ---------------------- ----------------------------
   [**Threshold**]{}          $2965$                 $3074$              $3185$           $3243$            $3327$              $3363$                    $3472$

  : $J=1/2$ states chosen and threshold mass in MeV.

\[tab1\]

    [**States**]{}        $\Xi^*_c\bar{K}$     $\Omega^*_c \eta$     $\Xi D^*$     $\Xi_c \bar{K}^*$       $\Xi^* D$      $\Xi^{\prime}_c \bar{K}^*$  
  --------------------- -------------------- --------------------- ------------- ---------------------- --------------- -------------------------------
   [**Threshold**]{}           $3142$               $3314$            $3327$             $3363$             $3401$                  $3472$

  : $J=3/2$ states chosen and threshold mass in MeV.

\[tab2\]

The meson-baryon interaction in the $\textrm{SU(3)}$ sector is given by the chiral Lagrangian [@ecker; @mizutani] $$\begin{aligned}
\label{lag}
\mathcal{L}^B = \frac{1}{4f_\pi^2}\, \langle \bar{B} i \gamma^{\mu} \Big[ (\Phi\, \partial_{\mu}\Phi -  \partial_{\mu}\Phi\,\Phi\,)B -
B(\Phi\, \partial_{\mu}\Phi -  \partial_{\mu}\Phi\,\Phi\,) \Big ] \rangle \, ,\end{aligned}$$ where $\Phi$, $B$ are the $\textrm{SU(3)}$ matrices for pseudoscalar 