Sökning: "Z boson"

Visar resultat 6 - 10 av 19 uppsatser innehållade orden Z boson.

  1. 6. Towards observing HH with ATLAS: ZH production and assessing theoretical uncertainties

    Master-uppsats, KTH/Fysik

    Författare :Jonatan Gisslén; [2021]
    Nyckelord :;

    Sammanfattning : Even though the Standard Model of particle physics represents one of the triumphs of modern physics and seems to predict the outcome of any collision experiment, it has several shortcomings and therefore needs to be extended. After the discovery of the Higgs boson, one of the main aims of experimental particle physics is to probe the Standard Model for measurements that deviate from predictions, as this would imply new physics. LÄS MER

  3. 7. Towards Vertexing Studies of Heavy Neutral Leptons with the Future Circular Collider at CERN

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Högenergifysik

    Författare :Rohini Sengupta; [2021]
    Nyckelord :Particle Physics; CERN; Future Circular Collider; FCC-ee; Heavy Neutral Leptons; Long-lived particles; Displaced signatures;

    Sammanfattning : Heavy Neutral Leptons (HNLs) are the heavier counterparts of the light neutrinos of the Standard Model of particle physics. HNLs can simultaneously solve several of the problems the Standard Model cannot yet resolve, one example being that they provide a candidate for Dark Matter. LÄS MER

  4. 8. Looking for mono-Z signatures in Z-boson and scalar dark matter interactions

    Kandidat-uppsats, Uppsala universitet/Högenergifysik

    Författare :Magnus Bertilsson; [2021]
    Nyckelord :Scalar Dark Matter; Z boson; Mono-Z signatures;

    Sammanfattning : Even though there is a multitude of observational evidence from cosmology and astrophysics, the standard model does not include a suitable dark matter candidate and therefore physics beyond the standard model is necessary. There are hypotheses of what the particle candidate could be coming from theories such as supersymmetry or extra dimensions. LÄS MER

  5. 9. Generalized Abelian Gauge Theory & Generalized Global Symmetry

    Master-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Emil Hössjer; [2020]
    Nyckelord :Differential characters; Wilson lines; generalized global symmetry; BF theory; Maxwell theory; spontaneous symmetry breaking; intersection number; selection rules; Noether theorem; sphere bundle; t Hooft operator;

    Sammanfattning : We study Cheeger-Simons differential characters in order to define higher form U(1) gauge fields and their Wilson lines. We then go on to define generalized global symmetries. This is a topological formulation of symmetries which has interesting consequences when the charged operators extend through space. LÄS MER

  7. 10. Using Neural Networks to Probe the Parameter Space of a 3HDM with a U(1) times Z2 Flavor Symmetry

    Master-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Ludvig Siwe; [2020]
    Nyckelord :Three Higgs Doublet Model; 3HDM; Machine Learning; Neural Network; Genetic Algorithm; Physics and Astronomy;

    Sammanfattning : Probing the physical regions in large parameter spaces of typical Standard Model (SM) extensions can be a very difficult computational task. In this thesis project, a new framework has been developed that utilises well-known Machine Learning (ML) techniques in the form of neural networks trained by a genetic algorithm. LÄS MER