Radiative decay of the $\Xi_c(2923)$ in a hadronic molecule picture

TL;DR

This paper investigates the radiative decay of the $ ext{Xi}_c(2923)^0$ baryon, modeling it as a hadronic molecule, and predicts decay widths that can distinguish this interpretation from other models in future experiments.

Contribution

It provides a molecular state explanation for $ ext{Xi}_c(2923)^0$ and calculates its radiative decay widths using effective Lagrangians, offering predictions to test against experimental data.

Findings

Decay widths for $ ext{Xi}_c(2923)^0 o ext{Xi}_c^0 \gamma$ are approximately 1.23-11.66 KeV.

Decay widths for $ ext{Xi}_c(2923)^0 o ext{Xi}_c^{'0}\gamma$ are approximately 0.30-3.71 KeV.

Predicted decay widths differ from those assuming a conventional charmed baryon, aiding in experimental tests.

Abstract

In the present work, we study the radiative decay of newly observed $\Xi_c(2923)^0$ based on the successful explanation that $\Xi_c(2923)^0$ is an $S$-wave $D\Lambda-D\Sigma$ molecular state in our previous study~\cite{Zhu:2020jke}. The radiative decay width of $D\Lambda-D\Sigma$ molecular state into $\Xi_c^0\gamma$ final state through hadronic loops are evaluated using effective Lagrangians. We find that decay width $\Xi_c(2923)^0\to\Xi_c^0\gamma$ and $\Xi_c(2923)^0\to\Xi_c^{'0}\gamma$ is evaluated to be approximately 1.23-11.66 KeV and 0.30-3.71 KeV, respectively. These are different from the results~\cite{Wang:2020gkn,Bijker:2020tns} that obtained by assuming $\Xi_c(2923)^0$ may be conventional charmed baryon. If measurements are in future experimental, these differences will be very useful to help us to test various interpretations of $\Xi_c(2923)^0$.