Weak decays of triply heavy baryons in light front approach

TL;DR

This paper studies the weak decay processes of the triply heavy baryon ^{++} using a light front quark model, predicting decay rates and identifying promising channels for experimental discovery.

Contribution

It provides the first detailed calculation of form factors and decay branching fractions for ^{++} decays, including semi-leptonic and hadronic channels, using a pole-model parametrization.

Findings

Predicted semi-leptonic decay branching fractions, e.g., 0.08% and 1.23%.

Estimated a sizable branching fraction (1.82%) for ^{++}^{+}^{+}^{+}^{+} decay.

Identified ^{++}^{+}^{+}^{+} as a promising channel for discovery.

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.