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The European Physical Journal A

, Volume 31, Issue 4, pp 458–460 | Cite as

Tests of the final-state radiation model at DAFNE near π + π - threshold

  • G. Pancheri
  • O. Shekhovtsova
  • G. Venanzoni
QNP 2006
  • 26 Downloads

Abstract.

Effects due to the non-pointlike behaviour of pions in the process e + e -π + π - γ can arise for hard photons in the final state. By means of a Monte Carlo event generator, which also includes the contribution of the direct decay φπ + π - γ, we estimate these effects in the framework of the resonance perturbation theory. We consider angular cuts used in the KLOE analysis of the pion form factor at threshold. A method to reveal the effects of the non-pointlike behaviour of pions in a model-independent way is proposed.

PACS.

13.25.Jx Decays of other mesons 12.39.Fe Chiral Lagrangians 13.40.Gp Electromagnetic form factors 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • G. Pancheri
    • 1
  • O. Shekhovtsova
    • 1
    • 2
  • G. Venanzoni
    • 1
  1. 1.INFN Laboratori Nazionale di FrascatiFrascati (RM)Italy
  2. 2.NSC “Kharkov Institute for Physics and Technology”Institute for Theoretical PhysicsKharkovUkraine

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