English

Pion form factors with improved infrared factorization

High Energy Physics - Phenomenology 2009-10-31 v2

Abstract

We calculate electromagnetic pion form factors with an analytic model for αs(Q2)\alpha_{\rm s}(Q^2) which is infrared (IR) finite without invoking a ``freezing'' hypothesis. We show that for the asymptotic pion distribution amplitude, Fπ0γγF_{\pi ^{0}\gamma ^{*}\gamma} agrees well with the data, whereas the IR-enhanced hard contribution to FπF_{\pi} and the soft (nonfactorizing) part can jointly account for the data.

Keywords

Cite

@article{arxiv.hep-ph/9807298,
  title  = {Pion form factors with improved infrared factorization},
  author = {N. G. Stefanis and W. Schroers and H. -Ch. Kim},
  journal= {arXiv preprint arXiv:hep-ph/9807298},
  year   = {2009}
}

Comments

12 pages; 3 figures as PS files (1 figure added); modified text; added references. To appear in Phys. Lett. B

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