Strong decay ${\mathrm{\Delta }}^{++}\to p\pi$ with light-cone QCD sum rules

In this article, we calculate the strong coupling constant $g_{\mathrm{\Delta }N\pi }$ and study the strong decay ${\mathrm{\Delta }}^{++}\to p\pi$ with the light-cone QCD sum rules. The numerical value of the strong coupling constant $g_{\mathrm{\Delta }N\pi }$ is consistent with the experimental data. The small discrepancy maybe due to failure to take into account the perturbative $\mathcal{O}({\alpha }_s)$ corrections.