Testing the molecular nature of the $\Omega(2012)$ with the $\psi(3770) \to \bar{\Omega} \bar{K} \Xi$ and $\psi(3770) \to \bar{\Omega} \bar{K} \Xi^*(1530) (\bar \Omega \bar K \pi \Xi)$ reactions

TL;DR

This paper investigates the molecular nature of the $ ext{Omega}(2012)$ resonance by analyzing specific decay reactions of $ ext{psi}(3770)$, finding peaks that support its molecular composition involving $ar{K} ext{Xi}^*$ and $ ext{eta} ext{Omega}$ components.

Contribution

It provides theoretical predictions of decay mass distributions that support the molecular interpretation of the $ ext{Omega}(2012)$ resonance.

Findings

Clear peaks corresponding to $ ext{Omega}(2012)$ observed in mass distributions.

A second broader peak around 2035 MeV linked to $ ext{Omega}(2012)$ decay channels.

Support for the molecular picture of $ ext{Omega}(2012)$ involving $ar{K} ext{Xi}^*$ and $ ext{eta} ext{Omega}$ components.

Abstract

We report on the reactions $\psi(3770)\to \bar{\Omega}^+ \bar{K} \Xi $ and $\psi(3770)\to \bar{\Omega}^+ \bar{K}\Xi^*(1530)~(\Xi^*(1530)\to \pi\Xi $), and calculate the mass distributions $\frac{{\rm d}\Gamma}{{\rm d}M_\text{inv}(\bar{K}\Xi)}$ and $\frac{{\rm d}\Gamma}{{\rm d}M_\text{inv}(\bar{K}\Xi^*)}$, respectively. We obtain clear peaks corresponding to the $\Omega(2012)$. From the decay of $\psi(3770)\to \bar{\Omega}^+ \bar{K}\Xi^*$, we also get a second, broader, peak around $2035\,\rm MeV$, which comes from the $\Omega(2012)$ decay to $\bar{K}\Xi^*$. This second peak is closely tied to the molecular picture of the $\Omega(2012)$ with the $\bar{K}\Xi^*(1530)$ and $\eta\Omega$ components. Its observation would provide a boost to the molecular picture of the $\Omega(2012)$.