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.Comment: 12 pages LATEX, 4 figures as compressed uu-encoded PS-file, preprint
University of Wuppertal WU-B-94-16, University of Bochum RUB-TPII-04/94 (some
typos eliminated
