Flatte-like distributions and the a_0(980)/f_0(980) mesons

Baru, V.; Haidenbauer, J.; Hanhart, C.; Kudryavtsev, A.; Meissner, Ulf-G.

Flatte-like distributions and the a_0(980)/f_0(980) mesons

Authors

Description

We explore the features of Flatte-like parametrizations. In particular, we demonstrate that the large variation in the absolute values of the coupling constants to the pi-eta (or pi-pi) and KKbar channels for the a_0(980) and f_0(980) mesons that one can find in the literature can be explained by a specific scaling behaviour of the Flatte amplitude for energies near the KKbar threshold. We argue that the ratio of the coupling constants can be much better determined from a fit to experimental data.
12 pages, 12 figures