Sökning: "Supergravity"
Visar resultat 11 - 15 av 30 avhandlingar innehållade ordet Supergravity.
11. Tensionless Strings and Supersymmetric Sigma Models : Aspects of the Target Space Geometry
Sammanfattning : In this thesis, two aspects of string theory are discussed, tensionless strings and supersymmetric sigma models.The equivalent to a massless particle in string theory is a tensionless string. Even almost 30 years after it was first mentioned, it is still quite poorly understood. LÄS MER
12. Strings as Sigma Models and in the Tensionless Limit
Sammanfattning : This thesis considers two different aspects of string theory, the tensionless limit of the string and supersymmetric sigma models with extended supersymmetry. First, the tensionless limit is used to find a IIB supergravity background generated by a tensionless string. The background has the characteristics of a gravitational shock-wave. LÄS MER
13. Exceptional Lie algebras and M-theory
Sammanfattning : In this thesis we study algebraic structures in M-theory, in particular the exceptional Lie algebras arising in dimensional reduction of its low energy limit, eleven-dimensional supergravity. We focus on e8 and its infinite-dimensional extensions e9 and e10. LÄS MER
14. Studies in field theory : supersymmetry and torsion potentials
Sammanfattning : This report contains introductions to and summaries of the papers which constitute my thesis. These papers treat four different topics: The first of these is the superspace treatment of the linear multiplet in six space-time dimensions, in particular the solution of the constraint for this multiplet. LÄS MER
15. Measurements of supersymmetry with the ATLAS experiment at the LHC
Sammanfattning : If supersymmetry exists at the electroweak scale, then it should be possible to discover it at CERN's next accelerator, the Large Hadron Collider (LHC). The phenomenology predicted by the supergravity inspired mimmal supersymmetric standard model (SUGRA) is examined in detail. LÄS MER