Supersymmetry vis-à-vis Observation: Dark Matter Constraints, Global Fits and Statistical Issues
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Weak-scale supersymmetry is one of the most favoured theories beyond the Standard Model of particle physics that elegantly solves various theoretical and observational problems in both particle physics and cosmology. In this thesis, I describe the theoretical foundations of supersymmetry, issues that it can address and concrete supersymmetric models that are widely used in phenomenological studies. I discuss how the predictions of supersymmetric models may be compared with observational data from both colliders and cosmology. I show why constraints on supersymmetric parameters by direct and indirect searches of particle dark matter are of particular interest in this respect. Gamma-ray observations of astrophysical sources, in particular dwarf spheroidal galaxies, by the Fermi satellite, and recording nuclear recoil events and energies by future ton-scale direct detection experiments are shown to provide powerful tools in searches for supersymmetric dark matter and estimating supersymmetric parameters. I discuss some major statistical issues in supersymmetric global fits to experimental data. In particular, I further demonstrate that existing advanced scanning techniques may fail in correctly mapping the statistical properties of the parameter spaces even for the simplest supersymmetric models. Complementary scanning methods based on Genetic Algorithms are proposed.
Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University , 2011. , 142 p.
supersymmetry, cosmology of theories beyond the Standard Model, dark matter, gamma rays, dwarf galaxies, direct detection, statistical techniques, scanning algorithms, genetic algorithms, statistical coverage
Subatomic Physics Astronomy, Astrophysics and Cosmology Subatomic Physics
Research subject Theoretical Physics
IdentifiersURN: urn:nbn:se:su:diva-57194ISBN: 978-91-7447-312-4OAI: oai:DiVA.org:su-57194DiVA: diva2:414563
2011-06-07, room FA32, AlbaNova University Center, Roslagstullsbacken 21, Stockholm, 13:00 (English)
Trotta, Roberto, Lecturer in Astrophysics
Edsjö, Joakim, ProfessorBergström, Lars, Professor
At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 4: Submitted.2011-05-122011-05-032011-06-28Bibliographically approved
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