Particle Correlations in Z and WW Events

TL;DR

This paper analyzes particle correlations in Z and W boson events from LEP data to understand hadron production dynamics, including Bose-Einstein and Fermi-Dirac correlations, and W decay independence.

Contribution

It provides new experimental results on particle correlations in Z and W decays, enhancing understanding of hadronization and W decay independence at LEP.

Findings

Observation of Bose-Einstein correlations in pion pairs

Detection of Fermi-Dirac correlations in antiproton pairs

Assessment of W boson decay independence

Abstract

Important information about the dynamics of hadron production can be obtained by the study of particle correlations. More than 16 million hadronic Z0 decays and several thousand W+W- events have been recorded from the four LEP collaborations between 1989 and 2000. Recently, in Z0 decays, new results of Bose-Einstein correlations in pairs of pions and Fermi-Dirac correlations for antiproton pairs were reported. In fully-hadronic W+W- decays particle correlations were used to study whether the two W bosons decay independently.