Intrinsic Transverse Size Effect

Details Intrinsic Transverse Size Effect Intrinsic Transverse Size Effect

1994-07-07

arxiv.org/abs/hep-ph/9407250v2

Phys.Lett.B342:345-350,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages LATEX, 4 figures as compressed uu-encoded PS-file, preprint University of Wuppertal WU-B-94-16, University of Bochum

Scientific paper

10.1016/0370-2693(94)01379-Q

Two recently proposed concepts to improve the perturbative calculation of exclusive amplitudes, gluonic radiative corrections (Sudakov factor) and confinement size effects (intrinsic transverse momentum) are combined to study the neutron magnetic form factor in the space-like region. We find that nucleon distribution amplitudes modelled on the basis of current QCD sum rules indicate overlap with the existing data at the highest measured values of momentum transfer. However, sizeable higher-order perturbative corrections (K-factor) and/or higher-twist contributions cannot be excluded, although they may be weaker than in the proton case.

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