Speaker
Patipan Uttayarat
Abstract:
We carry out a systematic flavor $SU(3)$ analysis of D-meson decays including the leading order symmetry breaking effects. We find that $SU(3)$ breaking can easily account for the recent LHCb measurement of the difference in CP asymmetries in the decays of $D^0$ into $K^+K^-$ and $\pi^+\pi^-$ mesons, once an enhancement mechanism, similar to the $\Delta=1/2$ rule in neutral kaon decays is assumed. As a byproduct of the analysis, one can make predictions regarding the individual asymmetries in $K^+K^-$, $\pi^+\pi^-$, as well as the $D^0 \to \pi^0\pi^0$ decay channels. Moreover, we find that the asymmetry in the decay $D^+\to \pi^+\pi^0$ vanishes in the leading approximation.
Author
Patipan Uttayarat
Co-author
David Pirtskhalava
(UC San Diego)
