We investigate the strong vertices among the ${\mathrm{\Lambda }}_b$, nucleon, and $B$ meson as well as the ${\mathrm{\Lambda }}_c$, nucleon, and $D$ meson in QCD. In particular, we calculate the strong coupling constants $g_{{\mathrm{\Lambda }}_{b}NB}$ and $g_{{\mathrm{\Lambda }}_{c}ND}$ for different Dirac structures entering the calculations. In the case of the ${\mathrm{\Lambda }}_{c}ND$ vertex, we compare the result with the only existing prediction obtained at $Q^2=0$.

• Received 28 October 2014

DOI:https://doi.org/10.1103/PhysRevD.90.114011