The effect of hidden color channels on nucleon-nucleon interaction in quark model

TL;DR

This paper investigates how hidden color channels influence nucleon-nucleon interactions within a quark model, showing they may be key to understanding intermediate-range attraction and fitting scattering data.

Contribution

It introduces a modified quark model incorporating hidden color channels and demonstrates their significance in nucleon interactions and deuteron properties.

Findings

Hidden color channels improve fit to $NN$ scattering phase shifts.

Coupling of hidden color channels contributes to intermediate-range attraction.

Model reproduces deuteron properties and suggests dibaryon candidates.

Abstract

In the framework of constituent quark model, the effect of hidden color channels on the nucleon-nucleon ($NN$) interaction is studied. By adjusting the color confinement strength between the hidden color channels and color singlet channels and/or between the hidden color channels and hidden color channels, the experimental data of $S$ to $I$ partial-wave phase shifts of $NN$ scattering can be fitted well. The results show that the hidden color channel coupling might be important in producing the intermediate-range attraction of $NN$ interaction. The deuteron properties and dibaryon candidates have also been studied with this model.