The Search for CP Violation in Hyperon Decays

TL;DR

This paper reviews the search for CP violation in hyperon decays, highlighting recent experimental progress, especially from Fermilab HyperCP, which enhances sensitivity to potential new physics beyond the standard model.

Contribution

It reports new experimental results from Fermilab HyperCP that significantly improve sensitivity in detecting CP violation in hyperon decays.

Findings

Increased sensitivity in CP violation searches from HyperCP

Constraints on beyond-the-standard-model theories

Progress in understanding CP violation mechanisms

Abstract

Searches for experimental manifestations of CP violation have born much fruit in recent years with the discovery of direct CP violation and the first evidence of CP violation outside of the neutral kaon system. Nevertheless we still know little about CP violation: its origin remains a mystery and there is little hard evidence that it is the sole province of the standard model. Searches for CP violation in hyperon decays offer promising possibilities as they are sensitive to certain beyond-the-standard-model sources that are not probed in other systems. We report on the status of such searches, in particular a new result from the Fermilab HyperCP experiment which has greatly increased the sensitivity over previous measurements and is confronting some beyond-the-standard-model theory predictions.