Prediction of $N\Omega$-like dibaryons with heavy quarks

TL;DR

This paper predicts the existence of heavy-quark $N ext{Omega}$-like dibaryons using a quark model, showing they are bound states with properties supporting experimental detection and insights into baryon interactions.

Contribution

It introduces the prediction of bound $N extOmega_{ccc}$ and $N extOmega_{bbb}$ dibaryons with heavy quarks within the quark delocalization color screening model, highlighting their binding mechanisms.

Findings

Both states are predicted to be bound with increasing binding energy for heavier quarks.

Channel coupling enhances the attraction and stability of the dibaryons.

Calculated scattering parameters support the existence of these dibaryons.

Abstract

Possible $N\Omega$-like dibaryons $N\Omega_{ccc}$ and $N\Omega_{bbb}$ with quantum numbers $IJ^P=\frac{1}{2}2^+$ are investigated within the framework of quark delocalization color screening model. We find both of these two states are bound, and the binding energy increases as the quarks of the system become heavier. The attraction between $N$ and $\Omega_{ccc}$ (or $\Omega_{bbb}$) mainly comes from the kinetic energy term due to quark delocalization and color screening. The effect of the channel-coupling provides more effective attraction to $N\Omega_{ccc}$ and $N\Omega_{bbb}$ systems. Besides, the scattering length, the effective range, and the binding energy, obtained from the calculation of the low-energy scattering phase shifts, also supports the existence of the $N\Omega_{ccc}$ and $N\Omega_{bbb}$ states. All these properties can provide necessary information for experimental search for the $N\Omega$-like dibaryons with heavy quarks. And the experimental progress can also check the mechanism of the intermediate-range attraction of the baryon-baryon interaction in quark models.