Instanton contribution to the pion and proton formfactors at Q^2 greater than 1 GeV^2

Details Instanton contribution to the pion and proton formfactors at Q^2 greater than 1 GeV^2 Instanton contribution to the pion and proton formfactors at Q^2 greater than 1 GeV^2

2003-09-16

arxiv.org/abs/hep-ph/0309179v2

Fizika B13 (2004) 193-200

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at 2nd NAPP Conference, Dubrovnik May 2003. Discussion improved. Results unchanged

Scientific paper

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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