Dalitz plot analysis of D_s+ and D+ decay to pi+pi-pi+ using the K-matrix formalism

Details Dalitz plot analysis of D_s+ and D+ decay to pi+pi-pi+ using the K-matrix formalism Dalitz plot analysis of D_s+ and D+ decay to pi+pi-pi+ using the K-matrix formalism

2003-12-12

arxiv.org/abs/hep-ex/0312040v2

Phys.Lett.B585:200-212,2004

Physics

High Energy Physics

High Energy Physics - Experiment

To be submitted to Phys.Lett.B A misprint corrected in formula 3

Scientific paper

10.1016/j.physletb.2004.01.065

FOCUS results from Dalitz plot analysis of D_s+ and D+ to pi+pi-pi+ are presented. The K-matrix formalism is applied to charm decays for the first time to fully exploit the already existing knowledge coming from the light-meson spectroscopy experiments. In particular all the measured dynamics of the S-wave pipi scattering, characterized by broad/overlapping resonances and large non-resonant background, can be properly included. This paper studies the extent to which the K-matrix approach is able to reproduce the observed Dalitz plot and thus help us to understand the underlying dynamics. The results are discussed, along with their possible implications on the controversial nature of the sigma meson.

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