Dalitz plot analysis and branching fraction measurement of D+ and Ds+ -> pi+pi-pi+

Ignacio Bediaga

Fermilab fixed target experiment E791 obtained a sample of $1172\pm 61$ events of $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ and 848 $\pm 44$ events of $D_s^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decays. We find respecti…