Examination of the H dibaryon within a chiral constituent quark model

TL;DR

This study investigates the H dibaryon using a chiral constituent quark model, analyzing its binding energy and the effects of various parameters, with results consistent with experimental and lattice QCD data.

Contribution

It provides a detailed coupled-channel calculation of the H dibaryon within a constrained quark model, exploring parameter effects and flavor symmetry breaking.

Findings

Binding energy compatible with Nagara event constraints

Results align with recent lattice QCD extrapolations

Detailed analysis of potential contributions and channel couplings

Abstract

We perform a coupled--channel calculation of the H dibaryon within a chiral constituent quark model. The problem is solved within a quark model constrained by the experimental data of strangeness --1 and --2 two--baryon systems. We examine in detail the role played by the different contributions of the interacting potential as well as the number of coupled channels considered. Special attention has been payed to the parameter dependence, flavor symmetry breaking and spatial configurations. The value extracted for the binding energy of the H dibaryon, being compatible with the restrictions imposed by the Nagara event, falls within a plausible extrapolation of recent lattice QCD results.