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 widths the processes $$\varLambda _{c} \rightarrow D^{*}N$$ , DN$$ $$\varSigma D N$$ \varDelta $$ D^{*} in Lagrangian method quark model picture with $$^{3}P_{0}$$ model. By employing $$D^{*} \varLambda interaction several literatures, strength parameter $$\lambda is fixed process . Then, $$D\varLambda _{c}N$$ $$D\varSigma _{c}\varDelta $$D^{*}\varSigma interactions are estimated channels respectively. _{c}^{*}\varDelta calculated heavy-quark large- $$N_c$$ sum rules. The this study will be useful further studies charm hadrons.