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- Title
Composite-meson model and meson exchange currents.
- Authors
Kezerashvili, R.; Boyko, V.
- Abstract
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.
- Subjects
MESONS; QUARKS; PARTICLES (Nuclear physics); NUCLEAR physics; PION-pion interactions
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2007, Vol 31, Issue 4, p662
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/i2006-10192-7