A Search for CP(T) Violation in B Decays at OPAL

TL;DR

This paper reports a search for CP(T) violation in B hadron decays by measuring lifetime differences between b and anti-b hadrons using OPAL data from LEP, aiming to detect potential symmetry violations in particle physics.

Contribution

It introduces a novel measurement of b and anti-b hadron lifetime differences using reconstructed secondary vertices in a large dataset from LEP.

Findings

No significant CP(T) violation observed.

Measured lifetime difference consistent with zero within uncertainties.

Provides constraints on CP violation in B decays.

Abstract

A search for CP(T) violation is performed and the fractional difference between the $b$ and $\bar b$ hadron lifetimes is measured using reconstructed secondary vertices in inclusive B hadron decays culled from 3.1 million $Z^0 \to q \bar q$ events. The data were collected by the OPAL experiment at the LEP collider at CERN at $\sqrt{s} \approx 91$ GeV from 1991-1995.