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Colour correlations and multiplicities in top events

Khoze, Valery A. and Sjöstrand, Torbjörn LU orcid (1994) In Physics Letters B 328(3-4). p.466-476
Abstract

In events of the type e+e- → tt → bW+bW-, 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 tt system and by the t → bW+ and t → bW- decays, with negligible interference between the production and decay between the t and t 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 b jets, close to the tt threshold. Also potential uncertainties in top mass determinations... (More)

In events of the type e+e- → tt → bW+bW-, 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 tt system and by the t → bW+ and t → bW- decays, with negligible interference between the production and decay between the t and t 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 b jets, close to the tt threshold. Also potential uncertainties in top mass determinations are briefly addressed.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters B
volume
328
issue
3-4
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:0001705737
ISSN
0370-2693
DOI
10.1016/0370-2693(94)91506-7
language
English
LU publication?
no
id
a12e577c-282c-4189-83a7-253dce8381e9
date added to LUP
2019-05-02 21:59:10
date last changed
2025-10-14 12:35:41
@article{a12e577c-282c-4189-83a7-253dce8381e9,
  abstract     = {{<p>In events of the type e<sup>+</sup>e<sup>-</sup> → tt → bW<sup>+</sup>bW<sup>-</sup>, 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 tt system and by the t → bW<sup>+</sup> and t → bW<sup>-</sup> decays, with negligible interference between the production and decay between the t and t 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 b jets, close to the tt threshold. Also potential uncertainties in top mass determinations are briefly addressed.</p>}},
  author       = {{Khoze, Valery A. and Sjöstrand, Torbjörn}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{3-4}},
  pages        = {{466--476}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters B}},
  title        = {{Colour correlations and multiplicities in top events}},
  url          = {{http://dx.doi.org/10.1016/0370-2693(94)91506-7}},
  doi          = {{10.1016/0370-2693(94)91506-7}},
  volume       = {{328}},
  year         = {{1994}},
}