Dalitz plot analysis in the FOCUS experiment

Abstract

The K-matrix formalism has been applied to the charm sector for the .rst time in the FOCUS Dalitz plot analyses of the Ds+ and D+ → π+π−π+ final states. The results, presented here, are extremely encouraging since the same K-matrix description provides a coherent picture of both two-body scattering measurements in light-quark experiments as well as charm meson decay. Such a result was not obvious beforehand. Moreover, the non-resonant component of each decay appears to be described by known two-body S-wave dynamics, without the need to include any three-body constant amplitude contribution.