Light meson spectrum and classical symmetries of QCD

Abstract

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.

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

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Cited by in corpus (49)

• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
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• Properties of new unflavored mesons below 2.4 GeV
• Universal description of radially excited heavy and light vector mesons
• Towards understanding broad degeneracy in non-strange mesons
• Generalizing the Noether theorem for Hopf-algebra spacetime symmetries
• Parity doubling in particle physics
• Chiral symmetry patterns of excited mesons with the Coulomb-like linear confinement
• Holographic like models as a five-dimensional rewriting of large-Nc QCD
• Qualitative solution of QCD sum rules
• Nucleon resonances in the fourth resonance region
• Chiral symmetry and the string description of excited hadrons
• Hydrogen like classification for light nonstrange mesons
• Cluster duality
• Low-energy holographic models for QCD
• Glueballs and deconfinement temperature in AdS/QCD
• AdS/QCD models describing a finite number of excited mesons with Regge spectrum
• The large degeneracy of excited hadrons and quark models
• High-spin mesons below 3 GeV
• Towards a theory of bottom-up holographic models for linear Regge trajectories of light mesons
• Implications of the Crystal Barrel data for meson-baryon symmetries
• Conformal symmetry and light flavor baryon spectra
• Parity doubling from Weinberg sum rules
• Towards reconciling the holographic and lattice descriptions of radially excited hadrons
• The sigma meson from QCD sum rules for large-$N_c$ Regge spectra
• Eight very excited spectra and one possible axion in SU(3) lattice gauge theory
• Gluon string breaking and meson spectrum in the holographic Soft Wall model
• Modelling duality between bound and resonant meson spectra by means of free quantum motions on the de Sitter space time dS4
• Hadrons and Chiral Symmetry
• Spectrum of very excited ${\Sigma }_g^{+}$ flux tubes in SU(3) gauge theory
• Gluon Excitations and Quark Chiral Symmetry in the Meson Spectrum: an Einbein Solution to the Large Degeneracy Problem of Light Mesons
• Electromagnetic couplings of radially excited light vector mesons from QCD sum rules
• Proton's Electromagnetic Form Factors from a Non-Power Confinement Potential
• Some indication for a missing chiral partner eta_4 around 2 GeV
• Large-$N_c$ masses of light mesons from QCD sum rules for non-linear radial Regge trajectories
• Lagrangian alternative to QCD string
• Dynamical $\mathbf{O}(4)$-Symmetry in the Light Meson Spectrum within the Framework of the Regge Approach
• The large-Nc limit of borelized spectral sum rules and the slope of radial Regge trajectories
• A multiquark approach to excited hadrons and Regge trajectories
• The case of equivalence of low and high energy constraints on Regge vector spectrum in AdS/QCD
• About the possibility of five-dimensional effective theories for low-energy QCD
• The linear radial spectrum of scalar mesons within the QCD sum rules in the planar limit
• Effective Chiral Symmetry Restoration for Heavy-Light Mesons
• Excited charmonium states from Bethe-Salpeter equation
• The experimental observation of $a_0(1710)$: Long awaited from Regge approach
• Potentials on the conformally compactified Minkowski spacetime and their application to quark deconfinement
• The flavor universality of some mass splittings in hadrons
• Meson coupling constants at high mass and large N_c