Analyses of ElectronProton and HadronHadron Collisions Using the Linked Dipole Chain Model
(2002) Abstract
 In this thesis we perform phenomenological studies of Quantum Chromodynamics, as manifested in deeply inelastic electronproton (DIS) and highenergy hadronhadron interactions.
Most of the results are obtained using the Linked Dipole Chain model (LDC). This model was originally developed for studies of DIS and is formulated in terms of kTfactorization and unintegrated parton distribution functions.
We develop a simple model, based on the CCFM and LDC models, which interpolates between the DGLAP and BFKL regimes in DIS. This model gives an intuitive qualitative picture of the transition region between the DGLAP and BFKL domains.
We use an approximate version of the LDC model to... (More)  In this thesis we perform phenomenological studies of Quantum Chromodynamics, as manifested in deeply inelastic electronproton (DIS) and highenergy hadronhadron interactions.
Most of the results are obtained using the Linked Dipole Chain model (LDC). This model was originally developed for studies of DIS and is formulated in terms of kTfactorization and unintegrated parton distribution functions.
We develop a simple model, based on the CCFM and LDC models, which interpolates between the DGLAP and BFKL regimes in DIS. This model gives an intuitive qualitative picture of the transition region between the DGLAP and BFKL domains.
We use an approximate version of the LDC model to obtain qualitative results for the inclusive minijet cross section and transverse energy flow, expected to be relevant in analyses of future highenergy hadronhadron or nucleusnucleus collisions. Our results contain a dynamical suppression at small transverse momenta, which corresponds to an effective cutoff which is slowly increasing with the total collision energy. This is in contrast to the traditional approach based on collinear factorization, which results in an inclusive cross section that diverges at small transverse momenta and implies the introduction of a cutoff parameter whose value needs to be adjusted to data.
The LDC model is particularly suitable for a description of e.g. the cross section for jets and heavy quarks at very high energies, where the effects of finite transverse momenta of partons inside the hadrons become increasingly important. We obtain results for the LDC integrated and unintegrated gluon distribution functions and compare them with those of other formalisms, e.g. those based on the CCFM model, demonstrating how to make a relevant comparison between the different formalisms.
We exploit the symmetric formulation of the LDC model with respect to the photon and proton ends and develop a version of the LDC model for hadronic interactions. In this preliminary analysis, we focus on features of jet and minijet production which are less sensitive to hadronization effects and compare our results to those of the PYTHIA event generator. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/464961
 author
 Miu, Gabriela ^{LU}
 opponent

 Prof Salam, Gavin, LPTHE, University of Paris VI, France
 organization
 publishing date
 2002
 type
 Thesis
 publication status
 published
 subject
 keywords
 hadronic interactions, Kärnfysik, Nuclear physics, QCD, DIS, Fysicumarkivet A:2002:Miu
 pages
 142 pages
 publisher
 Gabriela Miu, Sölvegatan 14A, SE223 62 Lund, Sweden,
 defense location
 Sal F, Theoretical Physics, Sölvegatan 14A, Lund
 defense date
 20021022 10:30
 ISBN
 9162853619
 language
 English
 LU publication?
 yes
 id
 1fadef0751484ea7bf52ead118823cbd (old id 464961)
 date added to LUP
 20070809 10:52:12
 date last changed
 20180529 09:53:09
@phdthesis{1fadef0751484ea7bf52ead118823cbd, abstract = {In this thesis we perform phenomenological studies of Quantum Chromodynamics, as manifested in deeply inelastic electronproton (DIS) and highenergy hadronhadron interactions.<br/><br> <br/><br> Most of the results are obtained using the Linked Dipole Chain model (LDC). This model was originally developed for studies of DIS and is formulated in terms of kTfactorization and unintegrated parton distribution functions.<br/><br> <br/><br> We develop a simple model, based on the CCFM and LDC models, which interpolates between the DGLAP and BFKL regimes in DIS. This model gives an intuitive qualitative picture of the transition region between the DGLAP and BFKL domains.<br/><br> <br/><br> We use an approximate version of the LDC model to obtain qualitative results for the inclusive minijet cross section and transverse energy flow, expected to be relevant in analyses of future highenergy hadronhadron or nucleusnucleus collisions. Our results contain a dynamical suppression at small transverse momenta, which corresponds to an effective cutoff which is slowly increasing with the total collision energy. This is in contrast to the traditional approach based on collinear factorization, which results in an inclusive cross section that diverges at small transverse momenta and implies the introduction of a cutoff parameter whose value needs to be adjusted to data.<br/><br> <br/><br> The LDC model is particularly suitable for a description of e.g. the cross section for jets and heavy quarks at very high energies, where the effects of finite transverse momenta of partons inside the hadrons become increasingly important. We obtain results for the LDC integrated and unintegrated gluon distribution functions and compare them with those of other formalisms, e.g. those based on the CCFM model, demonstrating how to make a relevant comparison between the different formalisms.<br/><br> <br/><br> We exploit the symmetric formulation of the LDC model with respect to the photon and proton ends and develop a version of the LDC model for hadronic interactions. In this preliminary analysis, we focus on features of jet and minijet production which are less sensitive to hadronization effects and compare our results to those of the PYTHIA event generator.}, author = {Miu, Gabriela}, isbn = {9162853619}, keyword = {hadronic interactions,Kärnfysik,Nuclear physics,QCD,DIS,Fysicumarkivet A:2002:Miu}, language = {eng}, pages = {142}, publisher = {Gabriela Miu, Sölvegatan 14A, SE223 62 Lund, Sweden,}, school = {Lund University}, title = {Analyses of ElectronProton and HadronHadron Collisions Using the Linked Dipole Chain Model}, year = {2002}, }