Chiral dynamics with vector fields: an application to ππ and πK scattering
1 GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planck Str. 1, 64291 Darmstadt, Germany
2 SSC RF ITEP, Bolshaya Cheremushkinskaya 25, 117218 Moscow, Russia
a e-mail: email@example.com
A theoretical study of Goldstone boson scattering based on the chiral Lagrangian with vector meson fields is presented. In application of a recently developed novel approach we extrapolate subthreshold partial-wave amplitudes into the physical region. The constraints set by micro-causality and coupled-channel unitarity are kept rigourously. It is shown that already the leading order subthreshold amplitudes lead to s- and p-wave ππ and πK phase shifts are in agreement with the experimental data up to about 1.2 GeV.
© Owned by the authors, published by EDP Sciences, 2012
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