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Instanton contribution to the pion and proton formfactors at Q² greater than 1 GeV²
classification
✦ hep-ph
keywords
contributionelectro-magneticformfactorformfactorsinstantonpionprotontransition
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Studying the instanton-induced contributions to various hard exclusive reactions provides physical insight into the transition from the non-perturbative to the perturbative regime of QCD. To this end, we study the leading-instanton contribution to the electro-magnetic and transition formfactors, using an effective theory of the Instanton Liquid Model. We report predictions for the space-like electro-magnetic formfactor of the pion, as well as recent results for the Dirac formfactor of the proton.
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