%0 Journal Article
%T Scalar resonances: scattering and production amplitudes
%A Boito
%A D. R.
%A Robilotta
%A M. R.
%J High Energy Physics - Phenomenology
%D 2007
%I 
%R 10.1103/PhysRevD.76.094011
%X Scattering and production amplitudes involving scalar resonances are known, according to Watson's theorem, to share the same phase $\delta(s)$. We show that, at low energies, the production amplitude is fully determined by the combination of $\delta(s)$ with another phase $\omega(s)$, which describes intermediate two-meson propagation and is theoretically unambiguous. Our main result is a simple and almost model independent expression, which generalizes the usual $K$-matrix unitarization procedure and is suited to be used in analyses of production data involving scalar resonances.
%U http://arxiv.org/abs/0705.3260