Dimension-2 condensates, zeta-regularization and large-Nc Regge Models

Abstract

Dimension-2 and -4 gluon condensates are re-analyzed in large-Nc Regge models with the zeta-function regularization which preserves the spectrum in any q qbar channel separately. We demonstrate that the signs and magnitudes of both condensates can be properly described within the framework.

3 pages, 1 figure. Talk given at 4th International Conference on Quarks and Nuclear Physics (QNP06), Madrid, Spain, 5-10 Jun 2006. (typos corrected. References added)

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• Scalar-isoscalar states in the large-Nc Regge approach
• Wilson Expansion of QCD Propagators at Three Loops: Operators of Dimension Two and Three
• The large degeneracy of excited hadrons and quark models
• Pion electromagnetic form factor, perturbative QCD, and large-Nc Regge models
• Regge-like spectra of excited singly heavy mesons
• Regge trajectories of Excited Baryons, quark-diquark models and quark-hadron duality
• Weinberg like sum rules revisited
• The sigma meson from QCD sum rules for large-$N_c$ Regge spectra
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• The large-Nc limit of borelized spectral sum rules and the slope of radial Regge trajectories
• Baryonic susceptibilities, quark-diquark models, and quark-hadron duality at finite temperature
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• The case of equivalence of low and high energy constraints on Regge vector spectrum in AdS/QCD
• The linear radial spectrum of scalar mesons within the QCD sum rules in the planar limit