Azimuthal Correlations in Dijet Events from Deep Inelastic Positron-Proton Scattering at HERA

Research output: ThesisDoctoral Thesis (monograph)


Correlations in the azimuthal angle between dijets produced in deep inelastic $e^{+}p$ scattering events, collected by the H1 experiment during 1999-2000, have been investigated. Cross sections are presented as a function of the azimuthal separation between the two jets in the hadronic center of mass frame, $Deltaphi^{*}$, in different regions of the photon virtuality $Q^{2}$ and in different regions of the Bjorken scaling variable $x_{Bj}$. The results are compared to the predictions of QCD models implementing LO matrix elements, matched parton showers and hadronisation as well as to NLO di-jet ($alpha _s ^{2}$) and NLO three-jet ($alpha _s ^{3}$) parton level calculations

corrected for hadronisation effects. Also, a fit of the unintegrated gluon density is presented, in which a first attempt to constrain the intrinsic

transverse momentum distribution is performed.


  • Magnus Hansson
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics


  • Elementary particle physics, Jets, Azimuthal Correlations, Dijets, Parton Dynamics, Low-x, H1, HERA, quantum field theory, Elementarpartikelfysik, kvantfältteori, Fysicumarkivet A:2007:Hansson
Original languageEnglish
Awarding Institution
Supervisors/Assistant supervisor
Award date2007 Sep 28
  • Experimental High-Energy Physics
Print ISBNs978-91-628-7258-8
Publication statusPublished - 2007
Publication categoryResearch

Bibliographic note

Defence details Date: 2007-09-28 Time: 10:15 Place: Lund University, Department of Physics, Professorsgatan 1, Sal B External reviewer(s) Name: Brook, Nick Title: Professor Affiliation: Bristol University ---