Large CP violation in charmed baryon decays

TL;DR

This paper predicts significant CP violation in antitriplet charmed baryon decays using flavor symmetry and re-scattering, suggesting observable effects that can test the Standard Model.

Contribution

First detailed numerical predictions of CP violation in charmed baryon decays using flavor SU(3) symmetry and re-scattering framework.

Findings

CP violation can reach order of 10^{-3}

Predictions are comparable to D0 decay asymmetries

Provides a new avenue for testing the Standard Model

Abstract

This work presents the first detailed numerical predictions of CP violation in antitriplet charmed baryon decays. Adopting the flavor $SU(3)_F$ symmetry and the final state re-scattering framework, we relate the CKM-suppressed amplitudes to the leading ones, which are proportional to $\lambda_b$ and $\lambda_d$, respectively, with $\lambda_q = V_{uq}V^*_{cq}$. Larger-than-expected CP violations are found, reaching the order of $10^{-3}$, similar in magnitude to those in $D^0 \to \pi^+\pi^- ,K^+K^-$. This opens a promising avenue for observing CP violation in charmed baryon decays and testing the Standard Model.