Ph.D. Thesis: Supersymmetry vis-à-vis Observation. Dark Matter Constratints, Global Fits and Statistical Issues
by
Yashar Akrami(SU Fysikum)
→
Europe/Stockholm
FA32
FA32
Description
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.
