Sökning: "Froggatt"

Hittade 5 uppsatser innehållade ordet Froggatt.

  1. 1. Renormalization Group Evolution Analysis of the Gauged Froggatt-Nielsen Mechanism in 2-Higgs-doublet Models

    Master-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Robin Plantey; [2019]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In this thesis, we consider a 2-Higgs-doublet model with a gauged Froggatt-Nielsen mechanism as an extension of the standard model. We assume that (i) the theory at the electroweak scale is the low energy limit of a theory defined at a scale $\Lambda_{FN}$ (ii) the Yukawa couplings at $\Lambda_{FN}$ are generated by the Froggatt-Nielsen mechanism. LÄS MER

  3. 2. Anomaly-free Froggatt-Nielsen extensions of the Standard Model with two Higgs doublets

    Master-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Felix Tellander; [2018]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : In this Master thesis we extend the Standard Model with an additional $U(1)$ gauge group and an additional Higgs doublet with a lepton specific $\mathbb{Z}_2$ symmetry. This is used in a gauged version of the Froggatt-Nielsen mechanism to describe the observed masses and mixings among fermions. LÄS MER

  4. 3. Explaining B-> D^(*) tau nu Decays with a Two Higgs Doublet Model using the Froggatt-Nielsen Framework

    Kandidat-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Emil Andersson; [2017]
    Nyckelord :Two Higgs Doublet Model; 2HDM; Froggatt-Nielsen; Flavon; B-meson; Higgs; Beyond Standard Model; BSM; Theoretical Particle Physics; Physics and Astronomy;

    Sammanfattning : In recent years, the BaBar, Belle and LHCb experiments have observed an excess of $B\to D^{(*)}\tau\nu$ decays compared to Standard Model predictions. In this thesis, we investigate if it is possible to explain this excess with a two Higgs doublet model using the Froggatt-Nielsen framework. LÄS MER

  5. 4. STUDY OF THE ELECTRON ELECTRIC DIPOLE MOMENT IN A FROGGATT NIELSEN TWO-HIGGS DOUBLET MODEL

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

    Författare :Johannes Sandberg; [2017]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : We consider a two Higgs doublet model with a U(1) Froggatt Nielsen mechanism. The Froggatt Nielsen charges of the fermions are chosen such that the correct mass structure and quark mixing matrix is obtained, and such that Flavor Changing Neutral Currents are within experimental limits. LÄS MER

  7. 5. U(1) Froggatt-Nielsen model for quark mass hierarchy in 2HDM

    Kandidat-uppsats, Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Johan Book; [2016]
    Nyckelord :2HDM; Froggatt; Nielsen; quark mass hierarchy; Physics and Astronomy;

    Sammanfattning : One approach to understanding the observed hierarchy in quark masses is by using the Froggatt-Nielssen mechanism. In this model new exotic (and presumable yet undetected) particles are introduced. LÄS MER