Sökning: "ATLAS detector"

Visar resultat 1 - 5 av 55 uppsatser innehållade orden ATLAS detector.

  1. 1. Non-linear effects in the ATLAS track-counting luminosity measurement

    Master-uppsats, Uppsala universitet/Högenergifysik

    Författare :Daniel Gautam; [2023]
    Nyckelord :Particle physics; CERN; ATLAS; Track counting; Luminosity; Monte Carlo; Track Selection;

    Sammanfattning : In this thesis the linearity of the ATLAS track-counting luminosity measurement is studied using two different sets Monte Carlo simulated crossings of proton-proton bunches. A primary high-momentum, or hard, interaction must be chosen for the Monte Carlo simulation. LÄS MER

  3. 2. Laser Metrology for assembly of ATLAS ITk-Strips

    Kandidat-uppsats, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Jonathan Arvin; Johannes Berg Wallin; Hugo Eskner; Olof Lindman Jardfelt; [2023]
    Nyckelord :Laser metrology; ATLAS; Inner Tracker ITk ; Micro Epsilon;

    Sammanfattning : The ATLAS detector at CERN's Large Hadron Collider has been instrumental in scientific discoveries,including the Higgs particle. As part of the High Luminosity (HL) upgrade, the current Inner Detector (ID) isbeing replaced by the new IInner Tracker (ITk), and Uppsala University is collaborating with industrypartner NOTE to produce around 700 modules for the ITk. LÄS MER

  4. 3. Determining backgrounds with misidentified leptons in the ATLAS Higgs boson analysis

    Master-uppsats, KTH/Fysik

    Författare :Leo Qiyuan Hu; [2023]
    Nyckelord :Particle Physics; ATLAS detector; Fake Factor method; Higgs boson; lepton misreconstruction; misidentified events; Partikelfysik; ATLAS detektorn; Fake Factor-metoden; Higgs boson; lepton felrekonstruktion; felidentifierade händelser;

    Sammanfattning : This thesis presents an analysis of misidentified leptons in the Higgs boson decaychannel H → W W ∗ → lνlν. Misidentified leptons, resulting from jets misidentifiedas leptons, mimic the signal of a Higgs boson decay, resulting in a backgroundcontribution to the signal. LÄS MER

  5. 4. ATLAS Inner Tracker Upgrade for HL-LHC: Silicon microstrip detector metrology

    Master-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Xiangyu Xu; [2023]
    Nyckelord :High energy physics experiment; LHC; HL-LHC; ATLAS; ITk; Metrology; Measurement; Physics and Astronomy;

    Sammanfattning : The Large Hadron Collider (LHC) will be upgraded to the High-Luminosity LHC (HL-LHC) by the end of this decade, with five times larger luminosity and 200 inelastic collisions per proton-proton bunch crossing. Thus, the ATLAS detector is challenged to survive the stronger radiation and the increased particle flux. LÄS MER

  7. 5. Constraining Physics Beyond the Standard Model with Emerging Jets using the ATLAS Experiment

    Kandidat-uppsats, KTH/Fysik

    Författare :Simon Thor; [2022]
    Nyckelord :ATLAS; CERN; particle physics; simulation; Python; C ; standard model; emerging jets; long-lived particles;

    Sammanfattning : Dark matter, the unknown matter that constitutes 85% of all matter in the universe, is one of the greatest mysteries in fundamental physics. One theory that might explain dark matter predicts that there are long-lived particles known as dark pions. LÄS MER