Interconnection Effects in Multiparticle Production from WW Events at LEP

TL;DR

This paper reviews experimental studies on interconnection effects in WW events at LEP, which influence multiparticle production and W mass measurements, by examining phenomena like colour rearrangement, gluon exchange, and Bose-Einstein correlations.

Contribution

It provides a comprehensive review of the experimental status regarding interconnection effects in WW hadronic decays at LEP.

Findings

Interconnection effects can impact W mass measurements.

Experimental analyses are ongoing to understand these effects.

Multiple stages of interactions influence particle production in WW events.

Abstract

Interactions between the products of the hadronic decays of different Ws in WW pair events can occur at several stages: from the colour rearrangement between the quarks coming from the primary branching, to the gluon exchange during the parton cascade, to the mixing of identical pions due to Bose-Einstein correlations. Besides the intrinsic interest of their study related to the understanding of the multiparticle production mechanisms, these phenomena can affect the ultimate accuracy in the W mass measurement by LEP 2. The status of the experimental analysis on interconnection effects between W pairs hadronically decaying is reviewed in this paper.