The strong ${\Lambda }_{b}NB$ and ${\Lambda }_{c}ND$ vertices

Abstract

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

Comments: 12 Pages, 3 Figures and 4 Tables