Sökning: "Baryogenesis"

Hittade 4 uppsatser innehållade ordet Baryogenesis.

1. 1. Exploring electroweak symmetry breaking in the scale-invariant Two-Higgs-Doublet Model

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Författare :Erik Rustas; [2023]
   Nyckelord :Two-Higgs-Doublet Models; 2HDM; Scale-invariance; Baryogenesis; BSM; Baryon Asymmetry; Coleman-Weinberg Potential; Theoretical Particle Physics; Physics and Astronomy;

   Sammanfattning : This thesis investigates the properties of a general scale-invariant Two-Higgs-Doublet Model and its phenomenological consequences with focus on the scalar sector. The concept suggests that introducing more CP-violation, both spontaneous and explicit, may make it possible to meet the Sakharov conditions and account for the Universe's baryon asymmetry. LÄS MER

3. 2. Cosmological implications of a QCD-like composite Higgs model

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

   Författare :Hristina Georgieva Hristova; [2021]
   Nyckelord :composite Higgs; technicolor; gravitational waves; LISA; phase transition; Physics and Astronomy;

   Sammanfattning : Some of the shortcomings of the Standard Model of particle physics are the 'unnatural' value of the mass of the Higgs boson and the fact that the model cannot account for the process of baryogenesis - a mechanism which generates the observed asymmetry between matter and anti-matter in the Universe. The former is related to the fundamental scalar nature of the Higgs boson, connected to quadratic divergences in the mass corrections. LÄS MER

4. 3. Strongly First Order Phase Transitions and The Possibility of Electroweak Baryogenesis in General Two-Higgs-Doublet Models

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

   Författare :Nils Hermansson Truedsson; [2016]
   Nyckelord :Two-Higgs-Doublet Models; 2HDM; Electroweak Phase Transition; Baryon Asymmetry; Electroweak Baryogenesis; Beyond Standard Model; BSM; Theoretical Particle Physics; Physics and Astronomy;

   Sammanfattning : The possibility to have a strongly first order electroweak phase transition, which is one of the Sakharov conditions for electroweak baryogenesis together with $\mathcal{CP}$ violation and baryon number violation, in general Two-Higgs-Doublet Models (2HDMs) is here investigated. Different kinds of $\mathbb{Z}_{2}$ breaking beyond standard assumptions are studied, in particular by allowing it to be completely broken as well as by assuming it to be only approximately preserved in the Yukawa sector. LÄS MER

5. 4. Electroweak phase transitions in the two-Higgs-doublet model after the first LHC run

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Högenergifysik

   Författare :Johan Löfgren; [2015]
   Nyckelord :Beyond standard model; phase transition; cosmology; matter-antimatter asymmetry; two-Higgs-doublet model;

   Sammanfattning : One of the main motivations to consider beyond standard model physics is the observed matter-antimatter asymmetry of our universe, since it cannot be explained by the standard model. In this thesis we study the two-Higgs-doublet model (2HDM) in order to test if there are regions of the parameter space of this model which are not yet excluded by experiment and which can explain the asymmetry by the process  of electroweak baryogenesis. LÄS MER