Novel Six-Quark Hidden-Color Dibaryon States in QCD

TL;DR

This paper explores the theoretical possibility of exotic six-quark dibaryon states in QCD, including hidden-color configurations, and discusses their properties and potential experimental detection.

Contribution

It introduces the concept of hidden-color six-quark states in QCD and analyzes their properties and implications for future experiments.

Findings

Identification of a potential $Q=+4$, isospin $I=3$ dibaryon state.

Discussion of decay properties linked to hidden-color configurations.

Proposal for experimental searches for these exotic states.

Abstract

The recent observation of a hadronic resonance $d^*$ in the proton-neutron system with isospin $I = 0$ and spin-parity $J^P = 3^+$ raises the possibility of producing other novel six-quark dibaryon configurations allowed by QCD. A dramatic example of an exotic six-quark color-singlet system is the charge $Q=+4$, isospin I=3, $I^z=+3$ $|uuuuuu>$ state which couples strongly to $\Delta^{++}$ + $\Delta^{++} .$ The width and decay properties of such six-quark resonances could be regarded as manifestations of "hidden-color" six-quark configurations, a first-principle prediction of QCD -- SU(3)-color gauge theory for the deuteron distribution amplitude. Other implications and possible future experiments are discussed.