Sökning: "Z boson"

Visar resultat 16 - 19 av 19 uppsatser innehållade orden Z boson.

  1. 16. Studies of a neutral Higgs boson produced in gluon-gluon fusion and vector boson fusion

    Kandidat-uppsats, Uppsala universitet/Högenergifysik

    Författare :Max Isacson; [2014]
    Nyckelord :neutral; higgs; boson; high energy physics; hep; atlas; lhc; simulation; gluon fusion; vector boson fusion; mechanism;

    Sammanfattning : This paper presents an outline of the generation of mass for the massive Standard Model particles (fermions, $W^\pm$, $Z^0$) through electroweak symmetry breaking via the Higgs mechanism, and how the Higgs boson emerges from this framework. A Monte Carlo study was done on the decay $H\rightarrow\tau\tau$, with one leptonically and one hadronically decaying tau, with two different production channels for the $H$, gluon-gluon fusion (gg) and vector boson fusion (VBF), at $\sqrt s = 7\tev$ with a Higgs mass $m_H = 120\gev$. LÄS MER

  3. 17. The Mass of the Higgs Boson

    Kandidat-uppsats, Lunds universitet/Fysiska institutionen

    Författare :Alexander Burgman; [2013]
    Nyckelord :atlas; cern; high energy; thesis; physics; higgs; particle; muon; partikelfysik; boson; bachelors; bachelor s; kandidat; bachelor; alexander; burgman; Physics and Astronomy;

    Sammanfattning : Abstract Within the Standard Model of particle physics, there was only one undiscovered fundamental particle. This was the Higgs boson. In July 2012, the announcement was made that a Higgs like particle had been discovered by the ATLAS Collaboration and the CMS Collaboration at CERN. LÄS MER

  4. 18. Studies of the Phenomenology of H+ → W+Z events with ATLAS at LHC

    Master-uppsats, Högenergifysik

    Författare :Henrike Fleischhack; [2012]
    Nyckelord :High energy physics; particle physics; Higgs boson; charged Higgs boson; LHC; ATLAS;

    Sammanfattning : The Higgs sector is the last part of the standard model of particle physics where we lack directexperimental results. Many extensions to the standard model describe an extended Higgs sector,often containing charged scalar bosons in addition to the standard model’s neutral Higgs boson. LÄS MER

  5. 19. Charged Higgs Boson Studies in ttbar -Dilepton Events at the LHC

    L3-uppsats, Högenergifysik

    Författare :Stephan Zimmer; [2009]
    Nyckelord :Charged Higgs; Supersymmetry; ttbar; Dilepton; Spin Distribution;

    Sammanfattning : A generator-level study of dilepton ttbar events to search for light charged Higgs bosons at the LHC is presented with the aim of finding a new variable to discriminate between charged Higgs signals and Standard Model signatures. The spin effects in leptonic decays of H± and W bosons are studied and a new angular distribution is identified as a discriminating variable. LÄS MER