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 $Q^2=0$.

arXiv comment12 Pages, 3 Figures and 4 Tables

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• Analysis of the strong coupling constant $G_{D_s^{\ast }{D}_s\varphi }$ and the decay width of $D_s^{\ast }\to D_s\gamma$ with QCD sum rules
• Weak Decays of Doubly Heavy Baryons: ${\mathcal{B}}_{cc}\to \mathcal{B}{D}^{(\ast )}$
• Analysis of the mass and width of the $X^{\ast }(3860)$ with QCD sum rules
• Strong coupling constants and radiative decays of the heavy tensor mesons
• Strong couplings of negative and positive parity nucleons to the heavy baryons and mesons
• Analysis of the strong coupling form factors of ${\Sigma }_{b}NB$ and ${\Sigma }_{c}ND$ in QCD sum rules
• Final-state rescattering mechanism in bottom-baryon decays
• Analysis of the strong vertices of ${\Sigma }_c\Delta D^{\ast }$ and ${\Sigma }_b\Delta B^{\ast }$ in QCD sum rules
• Analysis of the strong vertices of ${\Sigma }_{c}N{D}^{\ast }$ and ${\Sigma }_{b}N{B}^{\ast }$ in QCD sum rules
• Analysis of the semileptonic decays ${\Lambda }_b\to {\Lambda }_{c}l{\bar{\nu }}_l$ and ${\Xi }_b\to {\Xi }_{c}l{\bar{\nu }}_l$ in QCD sum rules
• Analysis of the electromagnetic form factors and the radiative decays of the vector heavy-light mesons
• Analysis of the strong vertexes of ${\Sigma }_c^{\ast }ND$ and ${\Sigma }_b^{\ast }NB$ in QCD sum rules
• Systematic analysis of the form factors of $B_c$ to $P$-wave charmonia and corresponding weak decays
• Estimation of coupling constants for D-meson, charmed, and light baryons in effective Lagrangian approach and quark model