S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians

Details S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians

2003-02-10

arxiv.org/abs/hep-ph/0302062v1

Phys.Rev.D67:074007,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 6 figures

Scientific paper

10.1103/PhysRevD.67.074007

An investigation of the s-wave channels in meson-meson scattering is performed within a U(3) chiral unitary approach. Our calculations are based on a chiral effective Lagrangian which includes the eta' as an explicit degree of freedom and incorporates important features of the underlying QCD Lagrangian such as the axial U(1) anomaly. We employ a coupled channel Bethe-Salpeter equation to generate poles from composed states of two pseudoscalar mesons. Our results are compared with experimental phase shifts up to 1.5 GeV and effects of the eta' within this scheme are discussed.

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