Is the a0(980) resonance a K anti-K bound state?

Abstract

We have analysed properties of two resonances a0(980) and a0(1450) using the pion-eta and K anti-K coupled channel model. Although the forces in the scalar-isovector K anti-K channel are attractive the a0(980) resonance cannot be interpreted as a kaon-antikaon bound state within our model.

Comments: 3 pages, 2 Postscript figures, needs ws-ijmpa.cls; talk given by L. Lesniak at the 8th International Workshop on Meson Production, Properties and Interaction of Mesons, MESON 2004, 4-8 June 2004, Krakow, Poland, to be published in the International Journal of Modern Physics A