21-25 March 2022
Salon de actos del IATA
Europe/Madrid timezone

CP violation in hadronic two-body D meson decays: a SM calculation

Not scheduled
15m
Salon de actos del IATA

Salon de actos del IATA

Carrer del Catedràtic Agustín Escardino Benlloch, 7, 46980 Paterna, Valencia
Poster

Speaker

Mrs. Eleftheria Solomonidi (IFIC (UV/CSIC))

Description

In 2019 the LHCb experiment discovered for the first time a clear signal of direct CP violation in the charm sector, in particular in the decays of $D^0$ mesons to $\pi^+\pi^-$ and $K^+K^-$. However, the theoretical determination of the strong part of the related decay amplitudes in the SM remains uncertain, mainly due to the difficulties when dealing with charmed hadronic asymptotic states. A long-known tool for assessing such amplitudes is dispersion relations. These arise from fundamental properties of the S-matrix elements and are data driven at large . Although they are easily understood and deployed in elastic channels, they become much more complicated when inelasticities are present. In this work we extract the CP-even and odd $D \rightarrow \pi\pi/ KK$ amplitudes within the SM, analysed in the isospin basis and with the use of unitarity and large number-of-colours expansion, by performing global fits to the current experimental data. Moreover, we implement novel numerical methods for dispersion relations in the inelastic isospin-0 channels.

Primary author

Mrs. Eleftheria Solomonidi (IFIC (UV/CSIC))

Co-authors

Presentation Materials

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