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Gluon form factor of the proton from QCD sum rules

URN to cite this document:
urn:nbn:de:bvb:355-epub-139954
Braun, Vladimir M. ; Górnicki, P. ; Mankiewicz, L. ; Schäfer, Andreas
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Date of publication of this fulltext: 12 Apr 2010 12:17


Abstract

We discuss the possibility to estimate hadronic matrix elements of gluonic operators in the framework of the QCD sum rule approach and consider in detail the particular example of the gluon form factor of the proton, normalized at Q2=0 to the fraction of the proton momentum carried by gluons. To this end we evaluate the proton coupling to a suitable quark-quark-quark-gluon current and calculate ...

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