Rescattering mechanism of weak decays of double-charm baryons

TL;DR

This paper explores the rescattering mechanism in weak decays of double-charm baryons, providing detailed theoretical analysis and predictions for decay processes involving doubly and singly charmed baryons.

Contribution

It offers a systematic study of two-body baryonic decays of doubly charmed baryons using the rescattering mechanism for final-state interactions.

Findings

Predicted decay channels of $\Xi_{cc}^{++}$ match observed data.

Developed a detailed framework combining short- and long-distance contributions.

Provided predictions for various baryonic decay modes.

Abstract

The doubly charmed baryon $\Xi_{cc}^{++}$ was recently observed by LHCb via the decay processes of $\Xi_{cc}^{++}\to \Lambda_c^+ K^-\pi^+\pi^+$ and $\Xi_c^+\pi^+$. These discovery channels were successfully predicted in the framework that the short-distance contributions are calculated under the factorization hypothesis and the long-distance contributions are estimated using the rescattering mechanism for the final-state-interaction effects. In this paper, we illustrate the above framework in details by systematic studies on the two-body baryonic decays $\mathcal{B}_{cc}\to\mathcal{B}_{c}P$ involving the doubly charmed baryons $\mathcal{B}_{cc}=(\Xi_{cc}^{++} , \Xi_{cc}^+,\Omega_{cc}^+)$, the singly charmed baryons $\mathcal{B}_{c}=(\mathcal{B}_{\bar{3}}, \mathcal{B}_{6})$ and the light pseudoscalar mesons $P=(\pi,K,\eta_{1,8})$.