Estimation of coupling constants for D-meson, charmed, and light baryons in effective Lagrangian approach and quark model

We estimate coupling constants for effective Lagrangians of \(D\)-meson, charmed, and light baryons from charmed baryon decay processes. First, we calculate decay widths for the processes \(\Lambda_{c} \to DN\), \(\Sigma_{c} \to D \Delta\), \(\Sigma_{c} \to D^{*} \Delta\), and \(\Lambda_{c} \to D^{*}N\) in effective Lagrangian method and quark model picture with \(^{3}P_{0}\) model. By employing the coupling constants for \(D^{*} \Lambda_{c} N\) interaction from several literatures, the strength parameter \(\lambda\) for \(^{3}P_{0}\) quark model is fixed in the decay process \(\Lambda_{c} \to D^{*}N\). Then, the coupling constants for the effective Lagrangians of \(D\Lambda_{c}N\), \(D\Sigma_{c}\Delta\), and \(D^{*}\Sigma_{c}\Delta\) interactions are estimated in the decay channels \(\Lambda_{c} \to DN\), \(\Sigma_{c} \to D \Delta\), and \(\Sigma_{c} \to D^{*} \Delta\), respectively. These coupling constants will be useful for further studies of charm hadrons.