The Pion Form Factor. Where Does It Come From?
Abstract
We discuss the nonleading, ``soft" contribution to the pion form factor at intermediate momentum transfer within operator product expansion approach. We argue, that the corresponding contribution can temporarily {\bf simulate} the leading twist behavior in the extent region of $ Q^2:~~3 GeV^2\leq Q^2\leq 35 GeV^2 $, where $Q^2 F(Q^2)\sim const.$ Such a mechanism, if it is correct, would be an explanation of the phenomenological success of the dimensional counting rules (which theoretically correspond to the keeping of the asymptotically leading terms only) at available, very modest $Q^2$. The relation with quark model calculation is also discussed.
 Publication:

arXiv eprints
 Pub Date:
 February 1994
 arXiv:
 arXiv:hepph/9402280
 Bibcode:
 1994hep.ph....2280Z
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 LATEX, 10 pgs. The basic, starting point of the entire approach is clarified. All numerical results are the same