Eur. Phys. J. C (2005) 44: 161-174
https://doi.org/10.1140/epjc/s2005-02354-2

Experimental Physics

Bose-Einstein Correlations in W⁺ W^– events at LEP2

Abstract

Bose-Einstein correlations (BEC) between final state particles in the reaction have been studied. Data corresponding to a total integrated luminosity of 550 pb^-1, recorded by the DELPHI detector at centre-of-mass energies ranging from 189 to 209 GeV, were analysed. An indication for inter-W BEC between like-sign particles has been found at the level of 2.4 standard deviations of the combined statistical and systematic uncertainties.