Sökning: "gauge theories"

Visar resultat 11 - 15 av 58 avhandlingar innehållade orden gauge theories.

  1. 11. Studies of fermion masses in Gauge theories

    Författare :Bengt-Åke Lindholm; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning : The Electroweak Standard Model of particle physics has proved to be avery successful theory. Nevertheless several questions have been raised dueto shortcomings of the model. The most outstanding question in this modelconcerns the origin of masses of the elementary particles. Eventually wehope that a more fundamental theory will explain the masses. LÄS MER

  3. 12. Gravity, gauge theories and the matrix model

    Författare :Teresia Månsson; Esko Keski-Vakkuri; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Theoretical Physics; teoretisk fysik;

    Sammanfattning : .... LÄS MER

  4. 13. Phenomenology of SO(10) Grand Unified Theories

    Författare :Marcus Pernow; Tommy Ohlsson; Werner Rodejohann; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Grand unified theories; Renormalization group equations; Neutrino masses; Gauge coupling unification;

    Sammanfattning : Although the Standard Model (SM) of particle physics describes observations well, there are several shortcomings of it. The most crucial of these are that the SM cannot explain the origin of neutrino masses and the existence of dark matter. LÄS MER

  5. 14. Studies of effective theories beyond the Standard Model

    Författare :Stella Riad; Tommy Ohlsson; Mattias Blennow; Johan Rathsman; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Effective field theories; neutrino physics; extra dimensions; universal extra dimensions; Higgs physics; renormalization group running; Bayesian statistics; coupling scale factor; grand unified theories;

    Sammanfattning : The vast majority of all experimental results in particle physics can be described by the Standard Model (SM) of particle physics. However, neither the existence of neutrino masses nor the mixing in the leptonic sector, which have been observed, can be described within this model. LÄS MER

  7. 15. LOST IN LOCALISATION searching for exact results in supersymmetric gauge theories

    Författare :Louise Anderson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Extended Supersymmetry; Matrix Models; Large N-techniques; Supersymmetric Gauge Theory; Localisation; Topological Field Theory;

    Sammanfattning : This thesis deals with one of the very basics of theoretical physics: computing observable quantities. In the language commonly used to describe the subatomic world, gauge theories, this problem is far from trivial as the observables are expressed in terms of infinite-dimensional integrals. LÄS MER