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Nonlinear Evolution in High Energy QCD

Avsar, Emil LU (2007)
Abstract (Swedish)
Popular Abstract in Swedish

QCD vid höga energier är fortfarande inte väl förstådd. Svårigheter uppkommer ifrån en starkt icke-linjär dynamik, samt från icke-störningsmässiga fenomen. Analytiska beräkningar är oftast möjliga enbart för enkla leksaksmodeller, eller för asymptotiska energier.



I denna avhandling undersöker vi dynamiken i högenergiprocesser, med målet att finna en fungerande och realistisk modell för högenergi-QCD. Vi utvecklar en fenomenologisk modell för högenergi-QCD baserad på QCD-dipolformalismen. Modellen inkluderar bidrag både från saturering och unitarisering, samt från icke-ledande effekter såsom energibevaring och löpande koppling. Modellen implementeras i en datorsimulering, och... (More)
Popular Abstract in Swedish

QCD vid höga energier är fortfarande inte väl förstådd. Svårigheter uppkommer ifrån en starkt icke-linjär dynamik, samt från icke-störningsmässiga fenomen. Analytiska beräkningar är oftast möjliga enbart för enkla leksaksmodeller, eller för asymptotiska energier.



I denna avhandling undersöker vi dynamiken i högenergiprocesser, med målet att finna en fungerande och realistisk modell för högenergi-QCD. Vi utvecklar en fenomenologisk modell för högenergi-QCD baserad på QCD-dipolformalismen. Modellen inkluderar bidrag både från saturering och unitarisering, samt från icke-ledande effekter såsom energibevaring och löpande koppling. Modellen implementeras i en datorsimulering, och lyckas reproducera högenergidata. (Less)
Abstract
QCD at very high energies is still not very well understood. Difficulties arise from a strong non-linear dynamics and also from nonperturbative physics. Detailed analytic calculations are often only possible either for simple toy models, or for asymptotically high energies. In this thesis we investigate the high energy dynamics, with the goal of finding a realistic, working model for high energy QCD. We develop a phenomenological model based on the QCD dipole formalism. The model includes contributions both from saturation and unitarisation, and also from non-leading effects such as energy conservation and running coupling. The model is implemented in a Monte Carlo simulation, and is able to reproduce data from high energy processes... (More)
QCD at very high energies is still not very well understood. Difficulties arise from a strong non-linear dynamics and also from nonperturbative physics. Detailed analytic calculations are often only possible either for simple toy models, or for asymptotically high energies. In this thesis we investigate the high energy dynamics, with the goal of finding a realistic, working model for high energy QCD. We develop a phenomenological model based on the QCD dipole formalism. The model includes contributions both from saturation and unitarisation, and also from non-leading effects such as energy conservation and running coupling. The model is implemented in a Monte Carlo simulation, and is able to reproduce data from high energy processes relevant for the LHC. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Professor McLerran, Larry, Brookhaven National Laboratory, NY, USA
organization
publishing date
type
Thesis
publication status
published
subject
keywords
Elementarpartikelfysik, quantum field theory, DIS, Elementary particle physics, Saturation, QCD, Small-x Physics, kvantfältteori, High energy interactions, cosmic rays, Kosmisk strålning, högenergi
pages
228 pages
publisher
Theoretical High Energy Physics
defense location
Lecture Hall F, Department of Theoretical Physics
defense date
2007-10-26 10:15
ISBN
978-91-628-7224-3
language
English
LU publication?
yes
id
b0f0056f-9280-4de0-9c11-543771f194e1 (old id 598967)
date added to LUP
2007-11-12 20:48:41
date last changed
2016-09-19 08:45:12
@misc{b0f0056f-9280-4de0-9c11-543771f194e1,
  abstract     = {QCD at very high energies is still not very well understood. Difficulties arise from a strong non-linear dynamics and also from nonperturbative physics. Detailed analytic calculations are often only possible either for simple toy models, or for asymptotically high energies. In this thesis we investigate the high energy dynamics, with the goal of finding a realistic, working model for high energy QCD. We develop a phenomenological model based on the QCD dipole formalism. The model includes contributions both from saturation and unitarisation, and also from non-leading effects such as energy conservation and running coupling. The model is implemented in a Monte Carlo simulation, and is able to reproduce data from high energy processes relevant for the LHC.},
  author       = {Avsar, Emil},
  isbn         = {978-91-628-7224-3},
  keyword      = {Elementarpartikelfysik,quantum field theory,DIS,Elementary particle physics,Saturation,QCD,Small-x Physics,kvantfältteori,High energy interactions,cosmic rays,Kosmisk strålning,högenergi},
  language     = {eng},
  pages        = {228},
  publisher    = {ARRAY(0x9b7e8d0)},
  title        = {Nonlinear Evolution in High Energy QCD},
  year         = {2007},
}