Why N*'s are Important

TL;DR

This paper discusses the significance of N* baryons in understanding Quantum Chromodynamics (QCD), highlighting evidence for the flux tube model and exploring various mechanisms of confinement and symmetry breaking.

Contribution

It provides a comprehensive review of recent evidence supporting the flux tube model and discusses its implications for understanding confinement and chiral symmetry breaking in QCD.

Findings

Support for the flux tube model in N* studies

Evidence for short-range one gluon exchange

Discussion of the connection between flux tubes and chiral symmetry breaking

Abstract

The study of N*'s can provide us with critical insights into the nature of QCD in the confinement domain. The keys to progress in this domain are the identification of its important degrees of freedom and the effective forces between them. I report on the growing evidence in support of the flux tube model, and comment on the connection between this model and spontaneous chiral symmetry breaking, on the spin-dependence of the long-range confining potential, on the evidence for short-range one gluon exchange, on instantons, and on the one pion exchange model.