Colour Correlations and Multiplicities in Top Events
Abstract
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.
Cite
@article{arxiv.hep-ph/9403394,
title = {Colour Correlations and Multiplicities in Top Events},
author = {Valery A. Khoze and Torbjorn Sjostrand},
journal= {arXiv preprint arXiv:hep-ph/9403394},
year = {2011}
}
Comments
16 pages, a compressed ps file is available via anonymous ftp to preprints.cern.ch, file /cern/9403/th-7199-94.ps.Z, report CERN-TH.7199/94 and DTP/94/18