Observability of glueball spectrum in QCD and the width of $σ$ resonance

Details Observability of glueball spectrum in QCD and the width of $σ$ resonance Observability of glueball spectrum in QCD and the width of $σ$ resonance

2008-12-04

arxiv.org/abs/0812.0934v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, no figure. Added computation of the gluon condensate: SVZ is confirmed

Scientific paper

We prove a theorem in QCD stating that in the limit of strong coupling, $g\to\infty$, the observed spectrum of glueballs in QCD is the same of a pure Yang-Mills theory, being mixing effects due to the next-to-leading order. A full effective theory for QCD is obtained and the width of the $\sigma$ resonance decay is straightforwardly computed. This appears as the lowest glueball state. Vacuum gluon condensate is computed that consistently support studies on the identification of this meson as a glueball.

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