QCD sum rules vs. chiral perturbation theory

Details QCD sum rules vs. chiral perturbation theory QCD sum rules vs. chiral perturbation theory

1994-05-13

arxiv.org/abs/hep-ph/9405287v1

Phys.Lett. B333 (1994) 27-32

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (no figures), UMPP 94-136

Scientific paper

10.1016/0370-2693(94)91003-0

QCD sum rules are useful tools for studying the spectral properties of hadrons; however, assumptions underlying standard sum-rule analyses can lead to inconsistencies with known results of chiral perturbation theory. This possibility is demonstrated with QCD sum-rule extractions of the nucleon mass and $\sigma$ term. In both cases, inconsistent chiral behavior leads to an uncertainty in the sum-rule predictions of $\sim 100\,\text{MeV}$.

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