Reveal short range interactions between $u/d$ quarks in the $NN$, $D_{03}$, and $D_{30}$ systems

TL;DR

This paper investigates the short-range interactions between u/d quarks in nucleon and delta systems using chiral SU(3) quark models, highlighting the dominance of vector meson exchange.

Contribution

It systematically compares different models and parameters to reveal the primary role of vector meson exchange in quark short-range interactions.

Findings

Vector meson exchange dominates short-range u/d quark interactions.

One gluon exchange has a small residual effect.

Results vary with different model parameters.

Abstract

The dynamic mechanism of short range interactions between $u/d$ quarks remains an open and challenging problem. In order to reveal this quark dynamics, we perform a systematic analysis of $NN$, $D_{03}$, and $D_{30}$ systems in the (extended) chiral SU(3) constituent quark models. By comparing results calculated with different models and different parameter sets, the effects of one gluon exchange and vector meson exchange terms are carefully examined. The results indicate that the vector meson exchange interactions dominate the short range interactions between $u/d$ quarks, whereas the small residual one gluon exchange coupling strength is also allowed.