Theory overview on amplitude analyses with charm decays
| Autor: | Loiseau, B. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | PoS CHARM2016 (2016) 033, conference: C16-09-05.2 proceedings |
| Druh dokumentu: | Working Paper |
| Popis: | This contribution about amplitude analyses in multibody hadronic charm decays deals with some attempts to introduce theoretical constraints. Different effective hadronic formalism approaches are mentioned. A recent work, based on a basic weak interaction process and a Chiral unitary model to account for the final state interaction, is described in details for the $f_0(980)$ production in $D_s^+ \to \pi^+ \pi^+ \pi^-$ and $D_s^+ \to \pi^+ K^+ K^- $ decays. Within the framework of the diagrammatic approach and flavor symmetry, a global analysis of two-body $D$ decays into a vector meson and a pseudoscalar meson is presented. A quasi-two-body QCD factorization model for $D$ decays into three mesons and its recent application to $D^0 \to K_S^0 \pi^+ \pi^-$ is outlined. For processes with final-state pions and kaons and as an alternative to the sum of Breit-Wigner amplitudes, often used in experimental Dalitz-plot analyses, amplitude parametrizations, in term of unitary $\pi \pi$, $\pi K$ and $K \bar K$ form factors, are proposed. These parametrizations are derived from quasi-two-body factorization models. Comment: 12 pages, 1 table, 2 figures, Contribution to the VIII International Workshop On Charm Physics, 5-9 September, 2016, Bologna, Italy. A related work, Ref. [18], has been added in section 2.1 and commented |
| Databáze: | arXiv |
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