Gluon Excitations and Quark Chiral Symmetry in the Meson Spectrum: an Einbein Solution to the Large Degeneracy Problem of Light Mesons

Abstract

A large approximate degeneracy of the excited hadron spectra, appears in the light meson spectra measured at LEAR, suggesting a novel principal quantum number n+j in QCD spectra. We recently showed that the large degeneracy could not be understood with state of the art confining and chiral invariant quark models, derived in a truncated Coulomb gauge. To search for a solution to this problem, here we add the gluon or string degrees of freedom. Although independently the quarks or the gluons would lead to a 2 n +j or 2 n +l spectrum, adding them may lead to the desired n+j pattern.

2 figures, 1 table, more detailed version

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Cited by in corpus (6)

• Eight very excited spectra and one possible axion in SU(3) lattice gauge theory
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• The experimental observation of $a_0(1710)$: Long awaited from Regge approach
• On confinement and chiral symmetry critical points
• The flavor universality of some mass splittings in hadrons
• Chiral symmetry restoration in excited hadrons and dense matter