Study of parity violation in $\Lambda_c^+\to\phi p$ and $\Lambda_c^+ \to \omega p$ decays

TL;DR

This paper explores the potential to measure CP violation in specific charmed baryon decays at collider experiments, providing formulas and sensitivity estimates for future measurements.

Contribution

It formulates decay processes and angular distributions for $\Lambda_c^+ o ext{phi} ext{p}$ and $\Lambda_c^+ o ext{omega} ext{p}$ decays, enabling CP violation studies in baryonic decays.

Findings

Formulated angular distribution formulas for the decays.

Estimated measurement sensitivities at BESIII and LHCb.

Provided a framework for future CP violation measurements.

Abstract

Evidence for CP violation in baryonic decays has not been seen in experiments. With large data events accumulated at $e^+e^-$ collider or Large Hadron Collider, the charmed baryon decays would provide a promising laboratory to test the CP symmetry. In this work, we formulate the $\Lambda_c^+\to\phi p$ and $ \Lambda_c^+\to\omega p$ decays for the measurements of their asymmetry parameters in weak decays at the BESIII or the LHCb experiments. The polarization transfer is analyzed in the two processes of $e^+ e^- \to\Lambda_c^+\bar\Lambda_c^-$ and $\Lambda_b^0\to \Lambda^+_c\pi^-$, and the formulas of the joint angular distribution for these processes are provided. The sensitivity of the measurement of asymmetry parameters for the above two decay processes is estimated for the future experiments.