Speaker
Description
This work presents the selection of the $D^{+}\rightarrow K{-}K{+}K{+}$ candidates and progress in the amplitude analysis of this decay using the Multi-meson model (Triple-M), a model based on an effective chiral Lagrangian. The study is based on a sample of $pp$-collision data, collected at a centre-of-mass energy of 13 TeV with the LHCb detector between 2016 and 2018. The results of the amplitude analysis using the latest version of the Multi-meson model are expected to give hints towards a more solid theoretical understanding of heavy-meson decays into three mesons. In particular, the $K{+}K{-}$ scattering amplitudes for the combinations of spin (0,1) and isospin (0,1) of the two-body system may be obtained from a Dalitz plot fit using the decay amplitude derived with the Triple-M.
