Measurement of Bose-Einstein Correlations in e+e- -> W+W- at root(s)=189GeV

TL;DR

This study examines Bose-Einstein correlations in W-pair production at 189 GeV, finding correlations within single W decays but no evidence of correlations between particles from different W bosons.

Contribution

First measurement of Bose-Einstein correlations in W-pair production at LEP energies, distinguishing between intra-W and inter-W correlations.

Findings

Bose-Einstein correlations observed within single W decays.

No evidence of Bose-Einstein correlations between particles from different W bosons.

Results consistent with correlations seen in light-quark Z decays.

Abstract

We investigate Bose-Einstein correlations (BEC) in W-pair production at root(s)=189GeV using the L3 detector at LEP. We observe BEC between particles from a single W decay in good agreement with those from a light-quark Z decay sample. We investigate their possible existence between particles coming from different W's. No evidence for such inter-W BEC is found.