Sökning: "Magnus Bertilsson"
Visar resultat 1 - 5 av 7 uppsatser innehållade orden Magnus Bertilsson.
1. The last unknown leading order low-energy constant of chiral perturbation theory
Master-uppsats, Uppsala universitet/KärnfysikSammanfattning : .... LÄS MER
2. Studies of the axial-vector transition form factors of the process Ω− → W−Ξ0 in chiral perturbation theory
Master-uppsats, Uppsala universitet/KärnfysikSammanfattning : This work is included in a broader research of the hadron theory group of Uppsala University and its collaborators tackling the quest for an understanding of the quark distribution inside hadrons by joining threedifferent approaches of QCD namely chiral perturbation theory, dispersion theory and lattice QCD. This thesis contributes by computing in chiral perturbation theory, the quark-masses dependence of form factors. LÄS MER
3. On the vector transition form factors in the Ω- → Ξ0 W- decay
Master-uppsats, Uppsala universitet/KärnfysikSammanfattning : To learn more about the structure of hadrons we study form factors. In the semi-leptonic decay Ω- → Ξ0W- two types of form factors arise namely the vector and axial-vector transition form factors. LÄS MER
4. Calculating scattering amplitudes in φ3 and Yang-mills theory using perturbiner methods
L3-uppsats, Uppsala universitet/Teoretisk fysikSammanfattning : We calculate tree-level scattering amplitudes in φ^3 theory and Yang-Mills theory by means of the perturbiner expansion. This involves solving the Euler-Lagrange equations of motion perturbatively via a multi-particle ansatz, and using Berends-Giele recursion relations to extract the solution from simple on-shell data. LÄS MER
5. Looking for mono-Z signatures in Z-boson and scalar dark matter interactions
Kandidat-uppsats, Uppsala universitet/HögenergifysikSammanfattning : Even though there is a multitude of observational evidence from cosmology and astrophysics, the standard model does not include a suitable dark matter candidate and therefore physics beyond the standard model is necessary. There are hypotheses of what the particle candidate could be coming from theories such as supersymmetry or extra dimensions. LÄS MER