Inclusive decays and lifetimes of doubly charmed baryons

TL;DR

This paper extends the analysis of charmed hadrons to doubly charmed baryons, predicting their decay rates and lifetimes based on a heavy diquark-light quark model, highlighting preasymptotic effects.

Contribution

It introduces a model describing doubly charmed baryons as a heavy diquark and light quark system, providing new predictions for their decay properties.

Findings

Predicted semileptonic branching ratios for doubly charmed baryons.

Estimated lifetimes based on preasymptotic effects.

Demonstrated the importance of meson wave functions in decay processes.

Abstract

The analysis of singly charmed hadrons has been extended to the case of doubly charmed baryons, $\Xi_{cc}^{++}$, $\Xi_{cc}^{+}$ and $\Omega_{cc}^{+}$. Doubly charmed baryons are described as a system containing a heavy $cc$-diquark and a light quark, similarly as in a heavy-light meson. This leads to preasymptotic effects in semileptonic and nonleptonic decays which are essentially proportional to the meson wave function. Interplay between preasymptotic effects in semileptonic and/or nonleptonic decay rates leads to very clear predictions for semileptonic branching ratios and lifetimes of doubly charmed baryons.