Baryon production in ALEPH

TL;DR

This paper presents recent ALEPH results on baryon production at the Z resonance, including hyperon rates, Lambda_b reconstruction, Xi_b observation, and baryon polarization measurements.

Contribution

It provides new experimental measurements of baryon production and polarization in Z decays, including the first observation of Xi_b in semileptonic decay.

Findings

Hyperon production rates measured

Lambda_b full kinematic reconstruction achieved

Xi_b observed in semileptonic decay

Abstract

Several recent results of the ALEPH Collaboration covering different aspects of baryon production on the Z resonance are presented. In particular production rates of hyperons, the full kinematical reconstruction of the Lambda_b, observation of Xi_b in its semileptonic decay, and the measurements of the polarization of Lambda and Lambda_b baryons are discussed.