Non-perturbative momentum dependence of the coupling constant and hadronic models
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Courtoy, Aurore; Scopetta, Sergio; Vento Torres, Vicente
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Aquest document és un/a article, creat/da en: 2011
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Models of hadron structure are associated with a hadronic scale which allows by perturbative evolution to calculate observables in the deep inelastic region. The resolution of Dyson-Schwinger equations leads to the freezing of the QCD running coupling (effective charge) in the infrared, which is best understood as a dynamical generation of a gluon mass function, giving rise to a momentum dependence which is free from infrared divergences. We use this new development to understand why perturbative treatments are working reasonably well despite the smallness of the hadronic scale. |
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