Phenomenological mass model for exotic hadrons and predictions for masses of non-strange dibaryons as hexaquarks

TL;DR

This paper develops a phenomenological mass model for exotic hadrons called hexaquarks and predicts their masses, successfully aligning some predictions with experimental data such as the $d^*(2380)$.

Contribution

It extends the G"ursey-Radicati mass formula to include non-charmed baryons, charmed baryons, and non-strange dibaryons for mass predictions.

Findings

Model fits some data sets well, especially with charmed baryons and dibaryons.

Predicted mass of $d^*(2380)$ close to experimental value.

Potential dibaryon masses range from 1900 to 3700 MeV.

Abstract

We investigate the mass spectra of exotic hadrons known as hexaquarks in the form of dibaryons. We use a phenomenological model based on an extended version of the G\"ursey-Radicati mass formula for hadrons to include non-charmed baryons, charmed baryons, and non-strange dibaryons to be able to predict masses of potential dibaryon states. We perform six numerical fits of this model to input data for three different sets of masses of baryons and dibaryons. We find that the model can fit some of the data sets well, especially the sets including charmed baryons and non-strange dibaryons, and observe that the predicted mass of one of the dibaryons is close to the measured mass of the observed hexaquark candidate $d^*(2380)$ reported by the WASA-at-COSY experiment. The predicted mass of the deuteron is slightly larger than its measured mass. Finally, for the data sets including charmed baryon and non-strange dibaryon masses, we find that the predicted masses of potential dibaryon states are all in the range from 1900 MeV to 3700 MeV.