Document Type

Article

Publication Version

Published Version

Publication Date

2009

Journal or Book Title

Journal of High Energy Physics

Volume

2009

Issue

6

First Page

055

DOI

10.1088/1126-6708/2009/06/055

Abstract

Classical conformal invariance of QCD in the chiral limit is broken explicitly by scale anomaly. As a result, the lightest scalar particle (scalar glueball, or dilaton) in QCD is not light, and cannot be described as a Goldstone boson. Nevertheless basing on an effective low-energy theory of broken scale invariance we argue that inside the hadrons the non-perturbative interactions of gluon fields result in the emergence of a massless dilaton excitation (which we call the ''scalaron''). We demonstrate that our effective theory of broken scale invariance leads to confinement. This theory allows a dual formulation as a classical Yang-Mills theory on a curved conformal space-time background. Possible applications are discussed, including the description of strongly coupled quark-gluon plasma and the spin structure of hadrons.

Comments

This article is from Journal of High Energy Physics (2009): 055, doi: 10.1088/1126-6708/2009/06/055. Posted with permission.

Rights

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Copyright Owner

SISSA

Language

en

File Format

application/pdf

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