Amplitude analysis of the $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay and measurement of the ${\pi }^{-}{\pi }^{+}$ S-wave amplitude

LHCb Collaboration

An amplitude analysis of the $D^{+}\to {\pi }^{-}{\pi }^{+}{\pi }^{+}$ decay is performed with a sample corresponding to $1.5\mathrm{f}{\mathrm{b}}^{-1}$ of integrated luminosity of $pp$ collisions at a centre-of-mas…