Hints for the existence of hexaquark states in the baryon-antibaryon sector

TL;DR

This paper predicts the spectrum of baryon-antibaryon states using a constituent model with chromo-magnetic interactions, suggesting possible new tetraquark states and aligning well with experimental observations.

Contribution

It introduces a novel spectrum prediction for baryon-antibaryon resonances and tetraquark states based on a fixed-parameter constituent model, providing detailed spectra and decay channels.

Findings

Predicted baryon-antibaryon resonance spectrum matches experimental data

Identified potential new tetraquark states, including a0(Y), Y(4140), and X(4350)

Provided detailed decay channels for future experimental verification

Abstract

The discovery of some baryon-antibaryon resonances has led us to consider 3q~3\bar{q} systems as possible candidates. We predict their spectrum in the framework of a constituent model, where the chromo-magnetic interaction plays the main role. The relevant parameters are fixed by the present knowledge on tetraquarks. The emerging scenario complies well with experiment. Besides the description of the baryon-antibaryon resonances, we find evidence for new tetraquark states, namely the a0(Y) in the hidden strangeness sector and, in the cs\bar{c}\bar{s} sector, the Y(4140) and the X(4350). A detailed account of the spectra and the decay channels is provided for future comparisons with data.