The European Physical Journal A

, Volume 31, Issue 4, pp 662–664 | Cite as

Composite-meson model and meson exchange currents

  • R. Ya. Kezerashvili
  • V. S. Boyko
QNP 2006


We study the meson exchange currents (MEC) mechanism for the pion double-charge exchange (DCX) reaction in a composite-meson model. The model assumes that the mesons are two-quark systems and can interact with each other only through quark loops. The contributions of the ρ, σ, and f0 mesons, the four-quark box diagram as well as a contact diagram has been taken into account. It is shown that the contribution of the ρ, σ, and f0 mesons increases the forward scattering cross-section in an average by 25% and decreases with energy.


25.80.Gn Pion charge-exchange reactions 25.80.Hp Pion-induced reactions 


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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • R. Ya. Kezerashvili
    • 1
  • V. S. Boyko
    • 1
  1. 1.Physics Department, New York City College of TechnologyThe City University of New YorkBrooklynUSA

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