the transition $D^0 \, p \to \pi^0 \, \Sigma_c^+$, if we extrapolate the local hidden gauge approach to SU(4), we would be exchanging a $D^\ast$ and the $c$ quarks are now involved. This is an extrapolation of the local hidden gauge approach which is model dependent. Fortunately, the exchange of $D^\ast$ is penalized with respect to the exchange of light vector mesons by a factor of $\displaystyle \left(\frac{m_\rho}{m_{D^\ast}}\right)^2$, which is a small factor and then one is only introducing uncertainties in some non diagonal terms which are very small. Formally one can use the SU(4) extrapolation of the local hidden gauge approach and for the diagonal terms the framework automatically filters the exchange of light vectors, providing the results that one obtains from the mapping explained before. This is what is done in Ref. [@angels].

In the present work the diagonal terms that we evaluate coincide with those of Ref. [@angels] where the model of Ref. [@hofmann] is used implementing also the exchange of vector mesons and $\textrm{SU(4)}$ symmetry for mesons and baryons. We, instead, use explicit wave functions for the baryon states imposing flavor-spin symmetry on the light quark sector and singling out the heavy quarks. Hence, in the 