On the use of the Operator Product Expansion to constrain the hadron spectrum

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We call into question a recently proposed idea on how the short-distance behavior of QCD correlation functions constrains hadronic states to become degenerate parity eigenstates as one goes up in the spectrum. In particular, we point out that the sum rules which have been proposed in this context are in general regulator dependent, and thus ill-defined.
10 pages, LaTeX. A few explanatory comments added. Conclusions unchanged. Version to appear in Journal

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High Energy Physics - Phenomenology, Nuclear Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/197216

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/hep-ph/0207060
 http://arxiv.org/abs/hep-ph/0207060
 Phys.Rev.D67:096001,2003
 doi:10.1103/PhysRevD.67.096001

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arXiv