Colour Correlations and Multiplicities in Top Events

Details Colour Correlations and Multiplicities in Top Events Colour Correlations and Multiplicities in Top Events

1994-03-30

arxiv.org/abs/hep-ph/9403394v1

Phys.Lett.B328:466-476,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, a compressed ps file is available via anonymous ftp to preprints.cern.ch, file /cern/9403/th-7199-94.ps.Z, report CE

Scientific paper

10.1016/0370-2693(94)91506-7

In events of the type e+ e- -> t tbar -> b W+ bbar W-, particle production could depend in a non-trivial way on the kinematics of the process. Energetic perturbative gluon radiation can be generated (when kinematically allowed) by the original t tbar system and by the t -> b W+ and tbar -> bbar W- decays, with negligible interference between the production and decay stages and between the t and tbar decays. Soft perturbative gluon emission and non-perturbative fragmentation does introduce a correlation, however. To illustrate the size of these effects, we study the multiplicity as a function of the angle between the b and bbar jets, close to the t tbar threshold. Also potential uncertainties in top mass determinations are briefly addressed.

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