The general QCD parametrization and the 1/N(c) expansion: A comparison

TL;DR

This paper compares the general QCD parametrization and the 1/N(c) expansion methods for analyzing hadron properties, clarifying when the large N(c) approximation aligns with real QCD and when it does not.

Contribution

It provides a detailed comparison of two QCD methods, highlighting the conditions under which the large N(c) expansion approximates real QCD.

Findings

The general parametrization is derived exactly from real QCD.

The equivalence of the large N(c) method to real QCD with 3 colors is questionable.

The paper clarifies why the large N(c) approximation sometimes works and sometimes does not.

Abstract

A comparison is presented of the two methods mentioned in the title for treating hadron properties in QCD.While the general parametrization is derived exactly from real QCD,the equivalence of the large N(c) description to real QCD with 3 colors,is questionable.The reason why in some cases the large N(c) method approximately works (while in others does not) is clarified.