SVZ duality in two-dimensional QCD

Resonance mass predictions from QCD sum rules are investigated in the context of two-dimensional QCD for various quark masses and currents. Results are presented using expanded and non-expanded ratios for both Borel moments and power moments as a function of s R = − s ≥ 0. If non-expanded ratios are...

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Bibliographic Details
Published in:Nuclear physics. B 1983-01, Vol.229 (1), p.29-52
Main Authors: Ditsas, Petros, Shaw, Graham
Format: Article
Language:English
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Summary:Resonance mass predictions from QCD sum rules are investigated in the context of two-dimensional QCD for various quark masses and currents. Results are presented using expanded and non-expanded ratios for both Borel moments and power moments as a function of s R = − s ≥ 0. If non-expanded ratios are used, the results are sensitive to the choice of quark mass definition, and the excitation energies are grossly overestimated in all cases. However, if expanded ratios are used, the results are insensitive to the quark mass definition, and much more precise. The best results are obtained using Borel moments, when excitation energies are overestimated by 6–12%.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(83)90352-8