Sökning: "FCNC"

Hittade 3 uppsatser innehållade ordet FCNC.

1. 1. Phenomenology of a Three Higgs Doublet Model with a U(1)xZ2 flavour symmetry

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

   Författare :Ian Padilla; [2019]
   Nyckelord :Phenomenology Physics Beyond the Standard Model Three Higgs Doublet Model Flavour Symmetry; Physics and Astronomy;

   Sammanfattning : We have studied the main features and the phenomenological consistency of a family-nonuniversal Three Higgs Doublet Model (3HDM) with a softly broken U(1)xZ2 family symmetry that enforces the flavour hierarchies in the Standard Model (SM) while implementing a tree-level Flavour Changing Neutral Current (FCNC) suppression in a Branco-Grimus-Lavoura way. Furthermore, the alignment limit is imposed in the scalar sector to enforce the physical scalar spectrum to accommodate a SM-like Higgs boson. LÄS MER

3. 2. Flavour-changing neutral currents in top quark decays to Higgs bosons in a two-Higgs-doublet model

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

   Författare :Leo Zethraeus; [2015]
   Nyckelord :2HDM; Particle Physics; High Energy Physics; Higgs; two-Higgs-doublet model; FCNC; Physics and Astronomy;

   Sammanfattning : In this thesis top quark decays to a charm quark and a (CP even) Higgs boson are investigated in a general two-Higgs-doublet model (2HDM) allowing flavour-changing neutral currents. The theory behind 2HDMs is introduced and the specific choice of 2HDM is put to test under theoretical constraints that require the potential in the Lagrangian density of the model to satisfy vacuum stability, tree-level unitarity and perturbativity. LÄS MER

4. 3. RGE properties of 2HDM in relation to data on B->Dtu

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

   Författare :Joel Oredsson; [2014]
   Nyckelord :particle physics; high energy physics; B meson; two Higgs doublet model; 2HDM; Higgs; RGE; BSM; Physics and Astronomy;

   Sammanfattning : In this thesis we investigate the properties of a specific two Higgs Doublet Model (2HDM) that can be used to explain the data on B->Dtu and B->D*tu, which deviate from the Standard Model (SM) by 3.4 sigma. The 2HDM is the simplest extension of the Standard model scalar sector. LÄS MER