https://doi.org/10.1140/epja/i2004-10105-x
Flatté-like distributions and the a0(980)/f0(980) mesons
1
Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117259, Moscow, Russia
2
Institut für Kernphysik (Theorie), Forschungszentrum Jülich, D-52425, Jülich, Germany
3
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, Nußallee 14-16, D-53115, Bonn, Germany
* e-mail: j.haidenbauer@fz-juelich.de
Received:
26
October
2004
Accepted:
10
November
2004
Published online:
3
January
2005
We explore the features of Flatté-like parametrizations. In particular, we demonstrate that the large variation in the absolute values of the coupling constants to the πη (or ππ) and K¯ channels for the a0(980) and f0(980) mesons that one can find in the literature can be explained by a specific scaling behaviour of the Flatté amplitude for energies near the K¯ threshold. We argue that the ratio of the coupling constants can be much better determined from a fit to experimental data.
PACS: 13.60.Le Meson production – / 13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy ⩽ 10 GeV) – / 14.40.Cs Other mesons with S = C = 0, mass < 2.5 GeV –
© Società Italiana di Fisica and Springer-Verlag, 2005
