QCDoriented nondiagonal GVDM
Abstract
The nondiagonal generalized vector dominance model (GVDM) of photoabsorption is elaborated using QCDmotivated picture of the (gamma)(q,anti q)  transition and subsequent meson dominated scattering of the (q, anti q)pair on the nucleon. The relativistic constituent quark model for a description of the meson (q, anti q)wave functionsis used. The mesonnucleon scattering is calculated in the twogluon exchange approximation. It is shown that the destructive interference effects and corresponding cancellations in the photoabsorption cross section formula are small, so the GVDM predictions are incorrect if no extra cutoff factors in GVDM formulas are introduced.
 Publication:

arXiv eprints
 Pub Date:
 December 1999
 arXiv:
 arXiv:hepph/9912384
 Bibcode:
 1999hep.ph...12384B
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 12 p