Gluon excitations and quark chiral symmetry in the meson spectrum: An einbein solution to the large degeneracy problem of light mesons

Journal Article · Fri Jan 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.014011· OSTI ID:21408960

Bicudo, P ^[1]

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1. Departamento de Fisica and CFTP, Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal)

A large approximate degeneracy appears in the light meson spectrum measured at the CERN low energy antiproton ring, 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 2n+j or 2n+l spectrum, adding them together may lead to the desired n+j pattern.

• OSTI ID: 21408960
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 1; Other Information: DOI: 10.1103/PhysRevD.81.014011; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CERN LEAR
CHIRAL SYMMETRY
CHIRALITY
DEGREES OF FREEDOM
EXCITATION
GLUONS
MATHEMATICAL SOLUTIONS
MESON SPECTROSCOPY
MESONS
QUANTUM CHROMODYNAMICS
QUARK MODEL
QUARKS
SPECTRA
BOSONS
CALCULATION METHODS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
FIELD THEORIES
HADRONS
MATHEMATICAL MODELS
PARTICLE MODELS
PARTICLE PROPERTIES
QUANTUM FIELD THEORY
SPECTROSCOPY
SYMMETRY