Bose-Einstein correlations in W-pair decays

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Data

2000-04-06

Autores

Éboli, O. J P [UNESP]
Gonzalez-Garcia, M. C.
Lietti, S. M.
Novaes, Sérgio Ferraz [UNESP]

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Resumo

Bose-Einstein correlations are studied in semileptonic (WW → qq̄lv) and fully hadronic (WW → qq̄qq̄) W-pair decays with the ALEPH detector at LEP at centre-of-mass energies of 172, 183 and 189 GeV. They are compared with those made at the Z peak after correction for the different flavour compositions. A Monte Carlo model of Bose-Einstein correlations based on the JETSET hadronization scheme was tuned to the Z data and reproduces the correlations in the WW → qq̄lv events. The same Monte Carlo reproduces the correlations in the WW → qq̄qq̄ channel assuming independent fragmentation of the two W's. A variant of this model with Bose-Einstein correlations between decay products of different W's is disfavoured. (C) 2000 Published by Elsevier Science B.V.

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mathematical model, negative pion radiation, particulate matter, physics, system analysis

Como citar

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, v. 478, n. 1-3, p. 50-64, 2000.