# On $SU(3)_{F}$ Breaking through Final State Interactions and CP Asymmetries in $D\to P P$ Decays

## TL;DR

This paper investigates how final state interactions cause SU(3)_F breaking in D meson decays to two pseudoscalars, successfully explaining experimental data and predicting CP violation and other observables.

## Contribution

It introduces a model attributing SU(3)_F breaking mainly to final state interactions, enabling accurate predictions of CP asymmetries and decay parameters.

## Key findings

- Excellent agreement with experimental data
- Predictions for CP violation in multiple channels
- Predicted branching fraction for D_s^+ to K^+K_L

## Abstract

We analyse $D$ decays to two pseudoscalars $(\pi,K)$ assuming the dominant source of $\mathrm{SU}(3)_F$ breaking lies in final state interactions. We obtain an excellent agreement with experimental data and are able to predict CP violation in several channels based on current data on branching ratios and $\Delta \mathrm{A_{CP}}$. We also make predictions for $\delta_{K\pi}$ and the branching fraction for the decay $D_s^+\to K^+K_L$.