Further study of the $N\Omega$ dibaryon within constituent quark models

TL;DR

This study investigates the $N ext{Ω}$ dibaryon using quark models, predicting a bound state detectable via experimental correlation analyses, and highlights the importance of hidden color channels in its formation.

Contribution

It provides a detailed theoretical analysis of the $N ext{Ω}$ dibaryon within quark models, predicting a bound state and emphasizing the role of hidden color channels.

Findings

Existence of an $N ext{Ω}$ bound state predicted.

Hidden color channel-coupling is crucial for attraction.

Potential observability in RHIC, LHC, and J-PARC experiments.

Abstract

Inspired by the discovery of the dibaryon $d^{*}$ and the experimental search of $N\Omega$ dibaryon with the STAR data, we study the strange dibaryon $N\Omega$ further in the framework of quark delocalization color screening model and chiral quark model. We have shown $N\Omega$ is a narrow resonance in $\Lambda\Xi$ D-wave scattering before. However, the $\Lambda$-$\Xi$ scattering data analysis is quite complicated. Here we calculate the low-energy $N\Omega$ scattering phase shifts, scattering length, effective range and binding energy to provide another approach of STAR data analysis. Our results show there exists an $N\Omega$ "bound" state, which can be observed by the $N$-$\Omega$ correlation analysis with RHIC and LHC data, or by the new developed automatic scanning system at J-PARC. Besides, we also find that the hidden color channel-coupling is important for the $N\Omega$ system to develop intermediate-range attraction.