• A Setup for Testing of Silicon Pixel Modules for the ITk Tracker in the ATLAS Experiment at CERN 

      Leung, Wai Chun (Master thesis, 2021-06-14)
      New pixel sensors will be installed to the new Inner Tracker upgrade at the ATLAS detector. These sensor will have higher radiation tolerance than the ones currently on the Inner Detector. This thesis will concentrate on ...
    • Analysis of 3D Pixel Detectors for the ATLAS Inner Tracker Upgrade 

      Heggelund, Andreas Løkken (Master thesis, 2017-06-16)
      The silicon 3D pixel detector represent a detector technology that has a higher radiation tolerance compared to the conventional planar pixel detectors. This detector technology is one of the technologies proposed to be ...
    • Charged-particle multiplicities in \(pp\) interactions at \(\sqrt{s}\) = 900 GeV measured with the ATLAS detector at the LHC 

      Aad, Georges; Buanes, Trygve; Burgess, Thomas; Eigen, Gerald; Johansen, Lars Gimmestad; Kastanas, Alex; Lipniacka, Anna; Mohn, Bjarte Alsaker; Øye, Ola Kristoffer; Sandaker, Heidi; Sjursen, Therese; Stugu, Bjarne; Tonoyan, Arshak; Ugland, Maren; Zutshi, V. (Peer reviewed; Journal article, 2010-04)
      The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy ...
    • Dark Matter Searches with ATLAS and Fermi 

      Morå, Knut Dundas (Master thesis, 2013-06-03)
      This thesis presents Dark matter inspired searches for supersymmetry with a one-tau analysis at ATLAS, which excludes a region close to that of allowed dark matter densities at m_0 ~ 400 GeV, m_1/2 ~ 600 GeV, tan \beta = ...
    • The Higgs Boson in Less Constrained Supersymmetric Models 

      Pettersen, Helge Egil Seime (Master thesis, 2012-06-01)
      In this thesis, we explore the phenomenological minimal supersymmetric standard model (pMSSM) in the context of the Higgs boson. If the emerging results from the LHC are real, will the pMSSM be able to accommodate this? ...
    • Measurement of the top-quark mass in the fully hadronic decay channel from ATLAS data at \(\sqrt{s}=7\) TeV 

      Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Franconi, Laura; Gjelsten, Børge Kile; Gramstad, Eirik; Ould-Saada, Farid; Pajchel, Katarina; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar Saavedra, Juan Antonio; Agustoni, Marco; ATLAS, Collaboration (Peer reviewed; Journal article, 2015-04-23)
      The mass of the top quark is measured in a data set corresponding to 4.6 fb\(^{−1}\) of proton--proton collisions with centre-of-mass energy \(\sqrt{s}=7\) TeV collected by the ATLAS detector at the LHC. Events consistent ...
    • Search for Dark Matter produced in association with a Higgs boson decaying to tau leptons at $\sqrt{\textrm{s}}$= 13 TeV with the ATLAS detector 

      Aakvaag, Erlend (Master thesis, 2020-12-09)
      This thesis presents a search for Dark Matter produced in association with the Standard Model Higgs boson decaying into two tau leptons at $\sqrt{s}=13$ TeV using Run 2 data from the ATLAS detector corresponding to an ...
    • Search for squarks in events with jets, hadronically decaying τ -lepton, and missing transverse momentum in the final state in proton-proton collision at √s = 13 TeV with the ATLAS detector 

      Leung, Wai Kit (Master thesis, 2021-09-01)
      Signal regions have been designed for search of squarks in events with jets, at least one hadronically decaying τ -lepton, and missing transverse momentum in the final state. The analysis is based on the LHC Run 2 dataset ...
    • Search for SUSY signals with tau leptons in the ATLAS detector 

      Sjursen, Therese Berge (Master thesis, 2008-02-15)
      The main topic of this thesis is the study of the discovery potential of the ATLAS detector for SUSY, by considering a supersymmetric decay chain involving two tau leptons. In supersymmetric models where R-parity is ...
    • Specially designed random forest loss function for high energy physics 

      Sprindys, Dovydas (Master thesis, 2022-06-01)
      The purpose of the ATLAS experiment at CERN is to provide a better understand of the underlying principles of fundamental particles and to potentially discover new ones, such as dark matter. The process of doing so is long ...