Sökning: "Baryon Asymmetry"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Baryon Asymmetry.

  1. 1. Development of a guide system for free neutron oscillation searches at the European Spallation Source

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Lunds Tekniska Högskola; Lunds universitet/European Spallation Source ESS AB

    Författare :Linnéa Björk; [2023]
    Nyckelord :ESS; neutrons; dark matter; antimatter; neutron guides; Physics and Astronomy;

    Sammanfattning : In this project, a neutron delivery system for the study of free neutron oscillations at the HIBEAM beamline at the European Spallation Source (ESS) has been developed. The HIBEAM experiment is part of a two-stage program at ESS which will address open questions in physics; specifically the nature of dark matter and the observed asymmetry between matter and antimatter in the Universe. LÄS MER

  3. 2. 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

  4. 3. Analysis of Simulated Charm Baryons : Decay Kinematics and Parameter Estimations for Studies with the Belle II Experiment

    Kandidat-uppsats,

    Författare :Elsa Spengler; Sara Bjursten; [2023]
    Nyckelord :CP-symmetry; charm baryon; estimation; generator; Belle II;

    Sammanfattning : A fundamental assumption of our universe has been that equal amounts of matter and antimatter were created during the Big Bang. Since the world we live in is made entirely of matter, one either needs to question this assumption, or explain how matter was enriched with respect to antimatter. LÄS MER

  5. 4. Electroweak Phase Transition in the Standard Model Effective Field Theory

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Högenergifysik

    Författare :Alan Aliyali; [2022]
    Nyckelord :;

    Sammanfattning : At least two Cosmological phase transitions are very probable to have happened since the beginning of the universe, one of them being the electroweak phase transition responsible for the breaking of the EW symmetry. It is possible that the EW phase transition could have caused the observed baryon asymmetry of the universe and therefore provide an explanation for the baryon asymmetry problem. LÄS MER

  7. 5. CP Violation Studies in Cascade Decay Sequence

    Kandidat-uppsats, Uppsala universitet/Kärnfysik

    Författare :Roman Sultanov; [2022]
    Nyckelord :CP violation; cascade; decay; asymmetry parameters; polarisation; uncertainty;

    Sammanfattning : This thesis studies CP violation in the decay of the Ξ− hyperon, also known as the cascade baryon, which decays in the sequence Ξ− → Λπ− → pπ−π−. A difference between the angular distribution of this decay sequence and the angular distribution of the charge conjugate decay sequence ͞Ξ+ →͞Λπ+ → ͞pπ+π+, after taking into account the inversion of the momenta due to the parity operation, is indicative of CP violation. LÄS MER