Narrow Results

A discussion is presented on aspects of supersymmetry in the context of quantum mechanical models. Rather than dealing with the details of specific models, the presentation aims to draw out general features of such systems.

The CDF and D0 experiments at Fermilab's Tevatron have been actively searching for the Higgs bosons that appear in extensions of the minimal standard model. Here we present the results of searches for the neutral and charged Higgs bosons of the minimal supersymmetric standard model, as well as searches for doubly charged Higgs bosons that are predicted by other types of extensions. Up to 900 pb^-1 of Run 2 data have been analyzed and have provided no signs of Higgs boson production; these null results are used to set limits on Higgs production scenarios within the context of particular models.

We review the use of invariant mass distributions in cascade decays to measure the masses of New Physics (NP) particles in scenarios where the final NP cascade particle is invisible. We extend earlier work by exploring further the problem of multiple solutions for the masses.

These TASI lecture notes give an introduction to supersymmetry (SUSY) and the minimal supersymmetric standard model (MSSM). After introducing superfield and superspace formalism I will describe soft supersymmetry breaking operators, the superpartner mass spectrum, electroweak symmetry breaking, renormalisation group evolution and dark matter all within the context of the MSSM.

Recent progress is presented on higher-order calculations for the mass spectrum of Higgs particles in the CP-conserving and CP-violating MSSM, covering diagrammatic two-loop calculations for neutral and charged Higgs bosons as well as all-order resummation of large logarithms arising from the strong and Yukawa coupling sectors.