中文

The Pion Form Factor. Where Does It Come From?

高能物理 - 唯象学 2009-09-25 v3

摘要

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 Q2:  3GeV2Q235GeV2 Q^2:~~3 GeV^2\leq Q^2\leq 35 GeV^2 , where Q2F(Q2)const.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 Q2Q^2. The relation with quark model calculation is also discussed.

关键词

引用

@article{arxiv.hep-ph/9402280,
  title  = {The Pion Form Factor. Where Does It Come From?},
  author = {A. Zhitnitsky},
  journal= {arXiv preprint arXiv:hep-ph/9402280},
  year   = {2009}
}

备注

LATEX, 10 pgs. The basic, starting point of the entire approach is clarified. All numerical results are the same