CP Violation in Decays Z --> 4 Jets

TL;DR

This paper investigates CP-violating effects in Z boson decays to four jets, exploring how effective couplings influence decay widths and proposing strategies for direct detection using CP-odd observables, with potential insights from LEP 1 data.

Contribution

It introduces new methods to search for CP-violating couplings in Z decays through CP-odd observables and analyzes their impact on decay widths.

Findings

CP-violating couplings can significantly affect decay widths

Proposed strategies enable direct search for CP violation in Z decays

LEP 1 data can provide meaningful constraints

Abstract

We analyse CP-violating effects in Z \to 4 jet decays, assuming the presence of CP-violating effective $Z b \bar{b} G$ and $Z b \bar{b} G G$ couplings. We discuss the influence of these couplings on the decay width. Furthermore, we propose various strategies of a direct search for such CP-violating couplings by using different CP-odd observables. The present data of LEP 1 should give significant information on the couplings.