A Dipole Model for High Energy QCD
(2011) Abstract (Swedish)
 Popular Abstract in English
This thesis considers a model of high energy particle collisions. The model is based on the so called BFKL formalism which is valid only at low x, that is collisions at very high energies, such as at the LHC. The intial state of the incoming particles are simulated by colour dipoles in transverse space evolved through rapidity. With this approach, all fluctuations are dynamically described, allowing for a large set of observables to be calculated.
The first paper compares the model to experimental results and the model is found to describe a large set of experiments with $pp$ and $\ga^*p$ accurately with just four tunable parameters. The second paper studies the fluctuations in... (More)  Popular Abstract in English
This thesis considers a model of high energy particle collisions. The model is based on the so called BFKL formalism which is valid only at low x, that is collisions at very high energies, such as at the LHC. The intial state of the incoming particles are simulated by colour dipoles in transverse space evolved through rapidity. With this approach, all fluctuations are dynamically described, allowing for a large set of observables to be calculated.
The first paper compares the model to experimental results and the model is found to describe a large set of experiments with $pp$ and $\ga^*p$ accurately with just four tunable parameters. The second paper studies the fluctuations in the interaction probability, and how this affects the cross section for diffractive excitation in $pp$ and $\ga^*p$. The model is further compared to a different approach, and many similarities are noted. The third paper studies the correlations between multiple hard subscatterings in $pp$ which are important for finding new physics at LHC.
The fourth paper is the largest project, and introduces a full event generator based on the dipole model. Here the dipoles are not only tracked in the initial evolution, but also all the particles coming out from the collision are calculated. It is found to provide a competetive description of all minimum bias data, something that has never been done in the BFKL formalism before. This provies a good comparison for other event generators that normally use a different approach. (Less)  Abstract
 This thesis considers a model of high energy particle collisions. The model is based on the so called BFKL formalism which is valid only at low x, that is collisions at very high energies, such as at the LHC. The intial state of the incoming particles are simulated by colour dipoles in transverse space evolved through rapidity. With this approach, all fluctuations are dynamically described, allowing for a large set of observables to be calculated.
The first paper compares the model to experimental results and the model is found to describe a large set of experiments with $pp$ and $\ga^*p$ accurately with just four tunable parameters. The second paper studies the fluctuations in the interaction probability, and how this... (More)  This thesis considers a model of high energy particle collisions. The model is based on the so called BFKL formalism which is valid only at low x, that is collisions at very high energies, such as at the LHC. The intial state of the incoming particles are simulated by colour dipoles in transverse space evolved through rapidity. With this approach, all fluctuations are dynamically described, allowing for a large set of observables to be calculated.
The first paper compares the model to experimental results and the model is found to describe a large set of experiments with $pp$ and $\ga^*p$ accurately with just four tunable parameters. The second paper studies the fluctuations in the interaction probability, and how this affects the cross section for diffractive excitation in $pp$ and $\ga^*p$. The model is further compared to a different approach, and many similarities are noted. The third paper studies the correlations between multiple hard subscatterings in $pp$ which are important for finding new physics at LHC.
The fourth paper is the largest project, and introduces a full event generator based on the dipole model. Here the dipoles are not only tracked in the initial evolution, but also all the particles coming out from the collision are calculated. It is found to provide a competetive description of all minimum bias data, something that has never been done in the BFKL formalism before. This provies a good comparison for other event generators that normally use a different approach. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/1888046
 author
 Flensburg, Christoffer ^{LU}
 supervisor
 opponent

 Venugopalan, Raju, Brookhaven Natl. Lab
 organization
 publishing date
 2011
 type
 Thesis
 publication status
 published
 subject
 keywords
 Fysicumarkivet A:2011:Flensburg
 pages
 190 pages
 publisher
 Department of Astronomy and Theoretical Physics, Lund University
 defense location
 Theoretical physics, sal F
 defense date
 20110429 10:15
 ISBN
 9789174731125
 language
 English
 LU publication?
 yes
 id
 014fa75e52aa4bba9ddc95e609398f48 (old id 1888046)
 date added to LUP
 20110503 11:15:29
 date last changed
 20181121 20:59:02
@phdthesis{014fa75e52aa4bba9ddc95e609398f48, abstract = {This thesis considers a model of high energy particle collisions. The model is based on the so called BFKL formalism which is valid only at low x, that is collisions at very high energies, such as at the LHC. The intial state of the incoming particles are simulated by colour dipoles in transverse space evolved through rapidity. With this approach, all fluctuations are dynamically described, allowing for a large set of observables to be calculated.<br/><br> <br/><br> The first paper compares the model to experimental results and the model is found to describe a large set of experiments with $pp$ and $\ga^*p$ accurately with just four tunable parameters. The second paper studies the fluctuations in the interaction probability, and how this affects the cross section for diffractive excitation in $pp$ and $\ga^*p$. The model is further compared to a different approach, and many similarities are noted. The third paper studies the correlations between multiple hard subscatterings in $pp$ which are important for finding new physics at LHC.<br/><br> <br/><br> The fourth paper is the largest project, and introduces a full event generator based on the dipole model. Here the dipoles are not only tracked in the initial evolution, but also all the particles coming out from the collision are calculated. It is found to provide a competetive description of all minimum bias data, something that has never been done in the BFKL formalism before. This provies a good comparison for other event generators that normally use a different approach.}, author = {Flensburg, Christoffer}, isbn = {9789174731125}, keyword = {Fysicumarkivet A:2011:Flensburg}, language = {eng}, pages = {190}, publisher = {Department of Astronomy and Theoretical Physics, Lund University}, school = {Lund University}, title = {A Dipole Model for High Energy QCD}, year = {2011}, }