Masses, Lifetimes and Production Rates of Xi- and anti-Xi+ at LEP 1

TL;DR

This paper reports measurements of Xi- and anti-Xi+ masses, lifetimes, and production rates at LEP 1, including a larger anti-Xi+ sample and analysis of production in different Z decay channels.

Contribution

It provides new measurements of Xi- and anti-Xi+ properties and compares production rates in Z -> b anti-b and Z -> q anti-q events with a larger data sample.

Findings

Measured Xi- and anti-Xi+ masses and lifetimes.

Compared production rates in different Z decay channels.

Determined the position of the maximum of the xi distribution.

Abstract

Measurements of the Xi- and anti-Xi+ masses, mass differences, lifetimes and lifetime differences are presented. The anti-Xi+ sample used is much larger than those used previously for such measurements. In addition, the Xi production rates in Z -> b anti-b and Z -> q anti-q events are compared and the position xi* of the maximum of the xi distribution in Z -> q anti-q events is measured.