Weak decays of triply heavy baryons in light front approach

Abstract

We analyze weak decays of triply heavy baryon ${\Omega }_{ccc}^{++}$ and calculate the form factors for ${\Omega }_{ccc}^{++}\to {\Xi }_{cc}^{++}/{\Omega }_{cc}^{+}$ transitions in a light front quark model. The momentum distributions in form factors are accessed via the pole-model parametrization. Using the results for form factors, we predict decay branching fractions for semi-leptonic decays, and obtain $\mathcal{B}({\Omega }_{ccc}^{++}\to {\Xi }_{cc}^{+}{e}^{+}{\nu }_e)=0.08\%$, $\mathcal{B}({\Omega }_{ccc}^{++}\to {\Omega }_{cc}^{+}{e}^{+}{\nu }_e)=1.23\%$. Forward-backward asymmetry and angular distributions are then investigated in this work. We also estimate branching fractions for a few color-allowed processes and find that the ${\Omega }_{ccc}^{++}\to {\Omega }_{cc}^{+}{\pi }^{+}$ has a sizable branching fraction: $\mathcal{B}({\Omega }_{ccc}^{++}\to {\Omega }_{cc}^{+}{\pi }^{+})=1.82\%$. We point out that the ${\Omega }_{ccc}^{++}\to {\Omega }_{cc}^{+}{\pi }^{+}$ is a golden channel for the discovery of the ${\Omega }_{ccc}^{++}$. This analysis can provide a useful reference for future experimental search in future.

Comments: 15 pages, 5 figures