Advanced

Colour Connections in e+e- annihilation

Friberg, Christer; Gustafson, Gösta LU and Häkkinen, Jari LU (1997) In Nuclear Physics, Section B B490. p.289-305
Abstract
We have a very limited knowledge about how the confinement mechanism works in

processes like $\epea\epe\ra\epq\epqa\ggn\ldots\ggn$, when there are identical

colour charges. In this case the partons can be colour connected by a string or

a cluster chain in several different ways. We do not know if in such a situation

Nature chooses a particular configuration at random, or if some configuration is

dynamically favoured. Also in the perturbative parton cascade we have no well

founded recipe for describing the interference effects, which correspond to non

planar diagrams and are caused by identical colour charges. We have studied two

different models, and are in particular... (More)
We have a very limited knowledge about how the confinement mechanism works in

processes like $\epea\epe\ra\epq\epqa\ggn\ldots\ggn$, when there are identical

colour charges. In this case the partons can be colour connected by a string or

a cluster chain in several different ways. We do not know if in such a situation

Nature chooses a particular configuration at random, or if some configuration is

dynamically favoured. Also in the perturbative parton cascade we have no well

founded recipe for describing the interference effects, which correspond to non

planar diagrams and are caused by identical colour charges. We have studied two

different models, and are in particular interested in the possibility that a

colour singlet gluon system hadronizes isolated from the remainder of the state.

Using double tagged events with heavy $\epc\epca$ or $\epb\epba$ quarks, it

appears to be possible to find a significant signal, if such events appear in

Nature.



If this type of (re)connected states appear in Z decays it may also be an

indication that reconnection might appear between the decay products of two W's

in the reaction $\epea\epe\ra\gwp\gwm\ra\epq_1\epqa_2\epQ_1\epQa_2$ at LEP2.

This would be important e.g. for a precision measurement of the W mass. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section B
volume
B490
pages
289 - 305
publisher
Elsevier
external identifiers
  • Scopus:0031567278
ISSN
0550-3213
DOI
10.1016/S0550-3213(97)00064-3
language
English
LU publication?
yes
id
a3eb5ce6-d9d6-4fd0-8729-8231af3fccdb (old id 1543953)
date added to LUP
2010-02-25 15:04:15
date last changed
2017-01-01 07:47:48
@article{a3eb5ce6-d9d6-4fd0-8729-8231af3fccdb,
  abstract     = {We have a very limited knowledge about how the confinement mechanism works in<br/><br>
processes like $\epea\epe\ra\epq\epqa\ggn\ldots\ggn$, when there are identical<br/><br>
colour charges. In this case the partons can be colour connected by a string or<br/><br>
a cluster chain in several different ways. We do not know if in such a situation<br/><br>
Nature chooses a particular configuration at random, or if some configuration is<br/><br>
dynamically favoured. Also in the perturbative parton cascade we have no well<br/><br>
founded recipe for describing the interference effects, which correspond to non<br/><br>
planar diagrams and are caused by identical colour charges. We have studied two<br/><br>
different models, and are in particular interested in the possibility that a<br/><br>
colour singlet gluon system hadronizes isolated from the remainder of the state.<br/><br>
Using double tagged events with heavy $\epc\epca$ or $\epb\epba$ quarks, it<br/><br>
appears to be possible to find a significant signal, if such events appear in<br/><br>
Nature.<br/><br>
<br/><br>
If this type of (re)connected states appear in Z decays it may also be an<br/><br>
indication that reconnection might appear between the decay products of two W's<br/><br>
in the reaction $\epea\epe\ra\gwp\gwm\ra\epq_1\epqa_2\epQ_1\epQa_2$ at LEP2.<br/><br>
This would be important e.g. for a precision measurement of the W mass.},
  author       = {Friberg, Christer and Gustafson, Gösta and Häkkinen, Jari},
  issn         = {0550-3213},
  language     = {eng},
  pages        = {289--305},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section B},
  title        = {Colour Connections in e+e- annihilation},
  url          = {http://dx.doi.org/10.1016/S0550-3213(97)00064-3},
  volume       = {B490},
  year         = {1997},
}