Tübingen 2003 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 13: Poster-Sitzung: Theorie

HK 13.7: Poster

Dienstag, 18. März 2003, 13:30–15:30, Foyer

S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians — •Buḡra Borasoy and Niklas Beisert — Physik Department der Technischen Universität München,Garching, Germany

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 η′ 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 η′ within this scheme are discussed.

Work supported by the Deutsche Forschungsgemeinschaft.