Light meson spectrum and classical symmetries of QCD

Details Light meson spectrum and classical symmetries of QCD Light meson spectrum and classical symmetries of QCD

2006-06-29

arxiv.org/abs/hep-ph/0606310v2

Eur.Phys.J.A29:327-335,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 1 figure. Some estimates and clarifying comments are added

Scientific paper

10.1140/epja/i2006-10080-2

Modern spectroscopic data on light non-strange meson spectrum is analyzed. It is argued that the observed regularities of experimental spectrum for highly excited states favour a partial restoration of all approximate classical symmetries of QCD Lagrangian (conformal, chiral and axial) broken by the quantum corrections. The rate of restoration of classical symmetries is estimated. The dependence of the resonance widths from the corresponding masses is systematically checked. On average, it turns out to be universal for the high excitations as predicted by the effective string description.

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