Effective restoration of chiral symmetry in excited mesons
arXiv:hep-ph/0605247 · doi:10.1016/j.physletb.2006.10.044
Abstract
A fast restoration of chiral symmetry in excited mesons is demonstrated. A minimal "realistic" chirally symmetric confining model is used, where the only interaction between quarks is the linear instantaneous Lorentz-vector confining potential. Chiral symmetry breaking is generated via the nonperturbative resummation of valence quarks self-energy loops and the meson bound states are obtained from the Bethe-Salpeter equation. The excited mesons fall into approximate chiral multiplets and lie on the approximately linear radial and angular Regge trajectories, though a significant deviation from the linearity of the angular trajectory is observed.
arXiv comment12 pp. One more clarifying paragraph has been added. To appear in Phys. Lett. B
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