Conference paper
Instanton contribution to the pion and proton electromagnetic form factors at Q2 ≥ 1 GeV2
P. Faccioli
; E.C.T., Strada delle Tabarelle 286, Villazzano (Trento), I-38050, Italy
A. Schwenk
; Department of Physics, The Ohio State University, Columbus, OH 43210, USA
E. V Shuryak
; Department of Physics and Astronomy, State University of New York, Stony Brook, NY 11794-3800, USA
Abstract
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 calculate the leading-instanton contributions to the electromagnetic and transition form factors using an effective theory of the instanton liquid model. We report predictions for the electromagnetic form factor Fπ(Q2 ) of the pion as well as novel results for the proton Dirac form factor F1(Q2 ).
Keywords
instanton-induced contributions; strong interactions; electromagnetic form factor; Dirac form factor
Hrčak ID:
305621
URI
Publication date:
1.3.2004.
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