On the Brink of Major Discoveries in Weak Charm Decays -- a Bismarckian Chance to Make History

TL;DR

Recent evidence of $D^0 - ar D^0$ oscillations at B factories offers a crucial opportunity to explore potential New Physics effects and ext{CP} violation in charm decays, which could reshape our understanding of flavor physics.

Contribution

The paper highlights the significance of charm oscillations as a new avenue for detecting New Physics and provides a detailed analysis of ext{CP} violation phenomenology in charm decays.

Findings

Evidence for $D^0 - ar D^0$ oscillations from B factories.

Charm oscillations could be fully explained by Standard Model or involve New Physics.

Charm decays present a unique platform for ext{CP} violation studies.

Abstract

The recently obtained strong evidence for $D^0 - \bar D^0$ oscillations from the $B$ factories provides an important benchmark in our search for New Physics in charm transitions. While the theoretical verdict on the observed values of $x_D$ and $y_D$ is ambiguous -- they could be fully generated by SM dynamics, yet could contain also a sizable contribution from New Physics -- such oscillations provide a new stage for \cp violation driven by New Physics. After emphasizing the unique role of charm among up-type quarks, I describe in some detail the \cp phenomenology for charm decays.